Construct full help message for known Command

[mattwiller]

Fixes #49

This depends on oclif/plugin-help#33 and will require that the plugin-help dependency in this repo is updated to a to-be-released version.

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @mattwiller to sign the Salesforce.com Contributor License Agreement.

[codecov]

Codecov Report

Merging #50 into master will increase coverage by 0.92%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #50      +/-   ##
==========================================
+ Coverage    70.5%   71.42%   +0.92%     
==========================================
  Files           4        4              
  Lines         139      133       -6     
  Branches       28       26       -2     
==========================================
- Hits           98       95       -3     
+ Misses         25       24       -1     
+ Partials       16       14       -2

Impacted Files	Coverage Δ
src/command.ts	78.26% <100%> (+2.2%)	⬆️
src/index.ts	77.77% <0%> (+0.5%)	⬆️

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[jdx]

nice! 💯

[oclif-bot]

🎉 This PR is included in version 1.5.5 🎉

The release is available on:

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

Your semantic-release bot 📦🚀

[salesforce-cla]

Thanks for the contribution! Unfortunately we can't verify the commit author(s): Matt Willer <m***@b***.com>. One possible solution is to add that email to your GitHub account. Alternatively you can change your commits to another email and force push the change. After getting your commits associated with your GitHub account, sign the Salesforce.com Contributor License Agreement and this Pull Request will be revalidated.