Add ability to handle import of .ts or .js files

[ro-savage]

This PR adds the ability to import both .ts files and .js files allowing for a smoother transition when moving a serverless repo to TypeScript or when someone wants to only use .ts when they use the .ts superset.

Tests are also updated.

Basically we just check if the .js or .ts exists.

Because the watcher will throw an error if it can't find a file to watch, we handle it here by checking if the file exists first and if it doesn't throwing an error letting the user know.

I also wasn't sure why dist is included in the repo, but ignored by .gitignore. Therefore the files in dist haven't changed in this PR.

[MikeBlair]

👍 We'd like this functionality as well.

[juanjoDiaz]

Is this blocked by anything?
I really would like to get this fixed since it's affecting other serverless plugins (see juanjoDiaz/serverless-plugin-warmup#85) as reported on #125

[Pithikos]

This is a big annoyance in a project that uses both Python and TS. The plugin tries to transpile Python files. Please merge this.

[furudean]

@divyenduz @JackCuthbert

[JackCuthbert]

Hey @ro-savage thanks for helping out! I'll take a look at this one (repro and test fix) on the weekend as it looks pretty important 😄

[titomb345]

+1 for this merging please. this is causing us big time headaches with our serverless build.

[marktani]

would love to see this merged, this is blocking me right now

[JackCuthbert]

Sorry for the delay on this one friends! I've just been able to repro this for myself and the fix appears to be good 🎉 Thanks, @ro-savage!

[divyenduz]

🎉 This PR is included in version 1.1.8 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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