fix(lerna): update lerna publish to use built-in command

[austingreendev]

Description

With the changes to lerna --since that broke our publish process in Travis. This is a good excuse to upgrade these commands to a more "standard" lerna configuration.

Now that we no-longer have a custom npm publish process I've updated the travis command to use:

yarn lerna publish from-git --no-verify-access --yes

• from-git
  • Will only publish if correctly tagged by Lerna (so no commit message check necessary)
• --no-verify-access
  • This is a little sketchy, but it seems just setting the NPM _authToken doesn't allow Lerna to know a user is "logged in". If a user doesn't have access it would just fail on publish (same as before)
• --yes
  • Skip confirmation prompts since we're in CI

Checklist

• 👌 design updates are Garden Designer approved (add the
  designer as a reviewer)
• 💅 view component styling is based on a Garden CSS
  component
• 🌐 Styleguidist demo is up-to-date (yarn start)
• ⬅️ renders as expected with reversed (RTL) direction
• 💂‍♂️ includes new unit and snapshot tests
• 📒 any new files are included in the packages src/index.js export
• 📝 tested in Chrome, Firefox, Safari, Edge, and IE11

[austingreendev]

Added due to some warnings after the ESLINT upgrade

[coveralls]

Pull Request Test Coverage Report for Build 533

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.124%

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Totals
Change from base Build 531:	0.0%
Covered Lines:	1783
Relevant Lines:	1799

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💛 - Coveralls