Cannot run the current tests

Hello!

I try just to execute the current test suite by instruction from the README:

```
luarocks install lunit
luarocks install lua-cjson
luarocks install luaposix
luarocks install luasocket
luarocks install luasec

make test
```

But getting this strange error in output:

```
root@c01a546084c0:/docker# make test
luacheck .
Checking raven/init.lua OK
Checking raven/senders/luasocket.lua OK
Checking raven/senders/ngx.lua OK
Checking raven/senders/reference.lua OK
Checking raven/senders/test.lua OK
Checking raven/util.lua OK

Total: 0 warnings / 0 errors in 6 files
tsc tests/*.lua
14 tests 14 passed 100 assertions 0 failed 0 errors 0 unassertive 0 pending
sed -e "s|%PWD%|$PWD|" tests/sentry.conf > tests/sentry.conf.out
touch empty-file
resty --http-include $PWD/tests/sentry.conf.out -e 'require("luarocks.loader"); require("telescope.runner")(arg)' empty-file tests/resty/*.lua
ERROR: (command line -e):1: module 'telescope.runner' not found:No LuaRocks module found for telescope.runner
no field package.preload['telescope.runner']
no file '/usr/local/openresty/site/lualib/telescope/runner.ljbc'
no file '/usr/local/openresty/site/lualib/telescope/runner/init.ljbc'
no file '/usr/local/openresty/lualib/telescope/runner.ljbc'
no file '/usr/local/openresty/lualib/telescope/runner/init.ljbc'
no file '/usr/local/openresty/site/lualib/telescope/runner.lua'
no file '/usr/local/openresty/site/lualib/telescope/runner/init.lua'
no file '/usr/local/openresty/lualib/telescope/runner.lua'
no file '/usr/local/openresty/lualib/telescope/runner/init.lua'
no file './telescope/runner.lua'
no file '/usr/local/openresty/luajit/share/luajit-2.1.0-beta3/telescope/runner.lua'
no file '/usr/local/share/lua/5.1/telescope/runner.lua'
no file '/usr/local/share/lua/5.1/telescope/runner/init.lua'
no file '/usr/local/openresty/luajit/share/lua/5.1/telescope/runner.lua'
no file '/usr/local/openresty/luajit/share/lua/5.1/telescope/runner/init.lua'
no file '/root/.luarocks/share/lua/5.1/telescope/runner.lua'
no file '/root/.luarocks/share/lua/5.1/telescope/runner/init.lua'
no file '/usr/local/openresty/site/lualib/telescope/runner.so'
no file '/usr/local/openresty/lualib/telescope/runner.so'
no file './telescope/runner.so'
no file '/usr/local/lib/lua/5.1/telescope/runner.so'
no file '/usr/local/openresty/luajit/lib/lua/5.1/telescope/runner.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
no file '/root/.luarocks/lib/lua/5.1/telescope/runner.so'
no file '/usr/local/openresty/site/lualib/telescope.so'
no file '/usr/local/openresty/lualib/telescope.so'
no file './telescope.so'
no file '/usr/local/lib/lua/5.1/telescope.so'
no file '/usr/local/openresty/luajit/lib/lua/5.1/telescope.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
no file '/root/.luarocks/lib/lua/5.1/telescope.so'
stack traceback:
(command line -e):1: in function 'inline_gen'
init_worker_by_lua:53: in function
[C]: in function 'xpcall'
init_worker_by_lua:61: in function
make: *** [Makefile:16: test] Error 1
```

## How to reproduce

Clone the master branch of the repository and go inside a root directory.

My environment is Docker image:

```Dockerfile
FROM openresty/openresty:1.17.8.2-buster

# Install LuaRocks
# based on https://github.com/openresty/docker-openresty/blob/6c7af091115a3da62038a93fb9e4c76ef7080bb7/buster/Dockerfile.luarocks_example
ARG RESTY_LUAROCKS_VERSION="3.3.1"

RUN DEBIAN_FRONTEND=noninteractive apt-get update \
&& DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
curl \
make \
unzip \
&& cd /tmp \
&& curl -fSL https://luarocks.github.io/luarocks/releases/luarocks-${RESTY_LUAROCKS_VERSION}.tar.gz -o luarocks-${RESTY_LUAROCKS_VERSION}.tar.gz \
&& tar xzf luarocks-${RESTY_LUAROCKS_VERSION}.tar.gz \
&& cd luarocks-${RESTY_LUAROCKS_VERSION} \
&& ./configure \
--prefix=/usr/local/openresty/luajit \
--with-lua=/usr/local/openresty/luajit \
--lua-suffix=jit-2.1.0-beta3 \
--with-lua-include=/usr/local/openresty/luajit/include/luajit-2.1 \
&& make build \
&& make install \
&& cd /tmp \
&& rm -rf luarocks-${RESTY_LUAROCKS_VERSION} luarocks-${RESTY_LUAROCKS_VERSION}.tar.gz

WORKDIR /tmp

RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
gcc \
liblua5.1-dev \
libssl-dev \
lua-check \
openresty-opm

RUN luarocks install telescope 0.6.0-1 \
&& luarocks install lunit 0.5-2 \
&& luarocks install lua-cjson 2.1.0.6-1 \
&& luarocks install luaposix 35.0-1 \
&& luarocks install luasocket 3.0rc1-2 \
&& luarocks install luasec 0.9-1
```

Dump this content to `Dockerfile` file in the root of the repository. Then run these commands:

```sh
docker build -t resty-rocks .
docker run --rm -it -v "$(pwd):/docker/" -w /docker resty-rocks bash
```

Then just execute `make test` inside the container.

As you can see, I've did `luarocks install telescope 0.6.0-1` to `Dockerfile`. Without these I got error about `tsc` command. I think we should add this command to `README.md` at least because it required to run the tests.

But this library haven't `telescope.runner` package. Can you advice how to fix the issue?