Refactoring/Linting#19

Merged

rwky merged 6 commits intopassport-next:masterfrom

brettz9:classes-linting

Jun 25, 2019

Commits on May 27, 2019

- Refactoring: Use ES6 classes, destructuring; use `forEach`; declare
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- Linting (eslint-config-ash-nazg) (including overcoming an issue in the
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Updated minimum node to 8 and added 12 support

Rowan Wookey
authored and
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- Add markdown to linting routine (JavaScript examples)
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-npm: Remove deprecated `licenses` field in favor of just `license` ( https://docs.npmjs.com/files/package.json#license )
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- Linting; Avoid need for settings with new ash-nazg defaults; disable require-jsdoc for tests; use new preference for "object" over "Object"
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