* Only install react-scripts in CI mode

* Link locally

* Re-enable all output tests

*  Polish webpack output

* Test sass support message

* Add more tests, but disabled

* Format missing default export error

* Format aliased import

* Why was node-sass required? Odd

* Format webpack rejection error

* Re-enable unknown package test

* Format file not found error and catch module scope plugin error

* Re-disable case sensitive paths

* Intercept and format case sensitive path errors

* Test out of scope message formatting

* Run behavior on macOS

* Run behavior on Node 8 and 10, only Node 8 for macOS

* Add some debugging

* Update matcher

* Only check stderr

* Remove old snapshot

* More debug

* Remove debug

* Add new debug

* Disable test on linux

* Add comment for future

 - babel-preset-react-app@5.0.0
 - react-app-polyfill@0.1.1
 - react-dev-utils@6.0.1
 - react-error-overlay@5.0.1
 - react-scripts@2.0.1

* Run smoke tests with Jest

* Get a unique port for smoke test

* Upgrade verdaccio across the board

* Drop unneeded step

* Try latest instead

* Boot registry in home directory

* Correct config path

* Add mutex

* Test webpack message formatting

* Strip color

* Add browserslist to default

* Disable another broken feature

 - babel-plugin-named-asset-import@0.2.0
 - babel-preset-react-app@4.0.0
 - confusing-browser-globals@1.0.1
 - create-react-app@2.0.0
 - eslint-config-react-app@3.0.0
 - react-app-polyfill@0.1.0
 - react-dev-utils@6.0.0
 - react-error-overlay@5.0.0
 - react-scripts@2.0.0

* Tweak browser support section

* Make sass message friendlier

* Tweak message

* Tweak message futher

* test

* Switch to stage 3 css

* Tweak default browsers, too

Derived from https://github.com/facebook/create-react-app/issues/4492#issuecomment-421959548

* Tweak environment handling

* Add documentation for getCacheIdentifier

Adjust the default browsers to be a single list and remove it from the build output; it only affects CSS now

Closes #4932, Closes #4876

* No lock files prevents the use of yarn upgrade & outdated

* Update deps

* Bump Jest across the board

* Add safe postcss parser

* Upgrade html webpack plugin

* Fix build

* fix FileSizeReporter in Windows enviroment

* chore: change line endings

This reverts commit 2c34d5b6.

This reverts commit 9690bc86.

Uglify is no longer maintained and has bugs not present in Terser (its successor)

* Update jest version

* Update babel-jest version

* Use testURL: http://localhost in jest configs.

* Update to jest version 23.5

This version of jest includes a fix for https://github.com/jsdom/jsdom/issues/2304

* "testURL": "http://localhost" is default with jest v23.5

* Use file name whitelist to prevent RCE

Use a whitelist to validate user-provided file names. This doesn't cover
the entire range of valid filenames but should cover almost all of them
in practice. Allows letters, numbers, periods, dashes, and underscores.
Opting to use a whitelist instead of a blacklist because getting this
wrong leaves us vulnerable to a RCE attack.

* Allow alphabet characters from all languages

Updated the whitelist to /^[\p{L}0-9/.\-_]+$/u, which matches
alphanumeric characters, periods, dashes, and underscores. Unicode
property support is stage 4 so I've inlined the transpiled version.

* Only use file name whitelist on Windows

* Log error message if file name does not pass whitelist