fix: RC008 RC009 fixes

[KyleTryon]

Changes

• Improved Shell-checking
• Previously the review job may have been triggering even when no run-step was present given the sequence would run on 0, this is likely the null that @wyardley showed in #128
• RC009 now ignores commands under 64 characters long, allowing short code to not be imported.\
• RC008 and RC009 now have an error for when a run-step is a string type, missing a name and command.

These examples will fail:

Not an object

- run: echo test

Missing name

  - run:
      command: echo test

These examples will pass:

Less than 32 char

  - run:
      name: test
      command: echo test

Resolves

• Fixes #128

[KyleTryon]

Hmm you're right! Thank you. I wonder why shellcheck isn't catching that, even locally.

[KyleTryon]

I've gone ahead and changed the char count up to 64 as well, I could see 32 was not really enough for even tiny things. 64 should be enough to npm/pip install a few items.

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