Error when installing script

I followed the instructions in the readme to install elm-script but I'm getting this error
```
% deno install -A -n elm-script ~/elm-script/runner/main.js
Download https://deno.land/std/path/mod.ts
Warning Implicitly using master branch https://deno.land/std/path/mod.ts
Download https://deno.land/std/path/_constants.ts
Download https://deno.land/std/path/win32.ts
Download https://deno.land/std/path/posix.ts
Download https://deno.land/std/path/common.ts
Download https://deno.land/std/path/separator.ts
Download https://deno.land/std/path/_interface.ts
Download https://deno.land/std/path/glob.ts
Warning Implicitly using master branch https://deno.land/std/path/glob.ts
Download https://deno.land/std/path/_globrex.ts
Download https://deno.land/std/testing/asserts.ts
Warning Implicitly using master branch https://deno.land/std/path/_interface.ts
Warning Implicitly using master branch https://deno.land/std/path/_constants.ts
Warning Implicitly using master branch https://deno.land/std/path/win32.ts
Download https://deno.land/std/path/_util.ts
Warning Implicitly using master branch https://deno.land/std/path/common.ts
Warning Implicitly using master branch https://deno.land/std/path/separator.ts
Warning Implicitly using master branch https://deno.land/std/path/posix.ts
Warning Implicitly using master branch https://deno.land/std/path/_globrex.ts
Warning Implicitly using master branch https://deno.land/std/testing/asserts.ts
Download https://deno.land/std/fmt/colors.ts
Download https://deno.land/std/testing/diff.ts
Warning Implicitly using master branch https://deno.land/std/path/_util.ts
Warning Implicitly using master branch https://deno.land/std/fmt/colors.ts
Warning Implicitly using master branch https://deno.land/std/testing/diff.ts
Compile file:///Users/martinstewart/elm-script/runner/main.js
error: Uncaught AssertionError: Unexpected skip of the emit.
at Object.assert ($deno$/util.ts:33:11)
at compile ($deno$/compiler.ts:1170:7)
at tsCompilerOnMessage ($deno$/compiler.ts:1338:22)
at workerMessageRecvCallback ($deno$/runtime_worker.ts:72:33)
at file:///Users/martinstewart/elm-script/__anonymous__:1:1
```

I'm running on Mac OS
```
% deno --version
deno 1.0.4
v8 8.4.300
typescript 3.9.2
```