lucky routes command does not work without any first argument

Nobody has claimed this yet.

It causes periodically when works with cli commands:

```
roquie:test-lucky$ lucky gen.model VatNumberType
Created CreateVatNumberTypes::V20200919094107 in ./db/migrations/20200919094107_create_vat_number_types.cr
Generated VatNumberType in ./src/models/vat_number_type.cr
Generated VatNumberTypeOperation in ./src/operations/save_vat_number_type.cr
Generated VatNumberTypeQuery in ./src/queries/vat_number_type_query.cr
roquie:test-lucky$ lucky routes
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky get.action.api
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky routes --help
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky get.action.api -h
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky db.migrate
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky get.action.api -h
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky get.action.api -h
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky gen.model -h
Generate a model, query, and save operation

Example:

lucky gen.model Project title:String description:String? completed:Bool priority:Int32
roquie:test-lucky$ lucky routes -h
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$ lucky routes asd

Routing documentation:

https://luckyframework.org/guides/http-and-routing/routing-and-params

GET /api/me ▸ Api::Me::Show

POST /api/sign_ins ▸ Api::SignIns::Create

POST /api/sign_ups ▸ Api::SignUps::Create

GET / ▸ Home::Index

roquie:test-lucky$ lucky routes asd -h
Show all the routes for the app

Run this task with 'lucky routes'
roquie:test-lucky$ lucky routes asd

Routing documentation:

https://luckyframework.org/guides/http-and-routing/routing-and-params

GET /api/me ▸ Api::Me::Show

POST /api/sign_ins ▸ Api::SignIns::Create

POST /api/sign_ups ▸ Api::SignUps::Create

GET / ▸ Home::Index

roquie:test-lucky$ lucky routes --trac
Compiling... ⣽ ^C

roquie:test-lucky$ lucky routes --trace | pbcopy # <---------- In this place I think what I should was be create an issue at Github and trying to get a full trace log for you :))

Unhandled exception: Invalid option: --trace (OptionParser::InvalidOption)
from ../../../../../../../usr/local/Cellar/crystal/0.35.1_1/src/option_parser.cr:129:45 in '->'
from ../../../../../../../usr/local/Cellar/crystal/0.35.1_1/src/primitives.cr:255:3 in 'parse'
from lib/lucky/tasks/routes.cr:4:1 in 'print_help_or_call'
from lib/lucky_cli/src/lucky_cli/runner.cr:27:9 in 'run'
from tasks.cr:20:1 in '__crystal_main'
from ../../../../../../../usr/local/Cellar/crystal/0.35.1_1/src/crystal/main.cr:105:5 in 'main_user_code'
from ../../../../../../../usr/local/Cellar/crystal/0.35.1_1/src/crystal/main.cr:91:7 in 'main'
from ../../../../../../../usr/local/Cellar/crystal/0.35.1_1/src/crystal/main.cr:114:3 in 'main'
roquie:test-lucky$ lucky routes

Routing documentation:

https://luckyframework.org/guides/http-and-routing/routing-and-params

GET /api/me ▸ Api::Me::Show

POST /api/sign_ins ▸ Api::SignIns::Create

POST /api/sign_ups ▸ Api::SignUps::Create

GET / ▸ Home::Index

roquie:test-lucky$ lucky routes

Routing documentation:

https://luckyframework.org/guides/http-and-routing/routing-and-params

GET /api/me ▸ Api::Me::Show

POST /api/sign_ins ▸ Api::SignIns::Create

POST /api/sign_ups ▸ Api::SignUps::Create

GET / ▸ Home::Index

roquie:test-lucky$ lucky gen.model -h
Generate a model, query, and save operation

Example:

lucky gen.model Project title:String description:String? completed:Bool priority:Int32
roquie:test-lucky$
roquie:test-lucky$
roquie:test-lucky$ lucky db.migrate
Migrated CreateVatNumberTypes::V20200919094107
roquie:test-lucky$ lucky get.action.api -h
Task get.action.api not found. Did you mean 'gen.action.api'?
roquie:test-lucky$ lucky gen.action.api -h
Generate a new api action

Example:

lucky gen.action.api Api::Users::Index
roquie:test-lucky$ lucky gen.action.api Api::VatNumberTypes::Index
Done generating Api::VatNumberTypes::Index in ./src/actions/api/vat_number_types
roquie:test-lucky$ lucky routes
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main

roquie:test-lucky$ lucky routes --error-trace
Showing last frame. Use --error-trace for full trace.

Unhandled exception: Negative argument (ArgumentError)
from raise:NoReturn
from String#*:String
from Crystal::TypeException+@Crystal::ErrorFormat#append_error_indicator:(String::Builder | Nil)
from Crystal::TypeException+@Crystal::ErrorFormat#error_body:(String | Nil)
from Crystal::TypeException+@Crystal::TypeException#append_to_s:(IO::FileDescriptor | Nil)
from Crystal::Command#run:(Bool | Nil)
from __crystal_main
from main
roquie:test-lucky$

# But flag `--error-trace` not showing more than default output.
```

I just use the tool like in docs and it behavior is so strange. I think is a little bug :)

```text
CRYSTAL_CACHE_DIR=/Users/roquie/.cache/crystal
CRYSTAL_PATH=lib:/usr/local/Cellar/crystal/0.35.1_1/src
CRYSTAL_VERSION=0.35.1
CRYSTAL_LIBRARY_PATH=/usr/local/Cellar/crystal/0.35.1_1/embedded/lib:/usr/local/lib
CRYSTAL_OPTS=''
```

MacOS Catalina 10.15.6

Start by reproducing the failure with `lucky routes` and `lucky routes --help`, then read `lib/lucky/tasks/routes.cr` and the command flow in `lib/lucky_cli/src/lucky_cli/runner.cr`. Confirm that routes and its help output work without a positional argument and that the reported Negative argument error is no longer produced.

Written by the indexing model from the issue text.