It appears trusty has Yarn ^v1.0.0 now.

So (#3054) shouldn’t be an issue changing to trusty. As Travis CI [precise support](https://blog.travis-ci.com/2017-08-31-trusty-as-default-status) will be dropped in March 2018 .

* Allowing for local "file:" prefixed scripts packages

* Fixing test failure

* Open editor to exact column from build error overlay

* Update launch editor validations

* Better documentation for setupTests.js when ejecting

When running `npm run eject` before creating `src/setupTests.js`, the resulting `package.json` file, won't contain any entry for it - and this is correct in my opinion, since otherwise Jest will crash - but it's useful to have it documented and avoid pointless waste of time.

* Added additional note about src/setupTests.js

Added another note about src/setupTests.js and `npm run eject` in Testing Components section

* Update README.md

* Update README.md

* Add svg screencast

* Use svg screencast

'more' and 'simpler' together is incorrect.

If create-react-app project is ejected and webpack configuration is
modified to multi build setup FileSizeReporter would fail.

In those situations `webpackStats` parameter would contain stats array
for each build. This fix will try to access stats and then falls back
to using plaing webpackStats object.

* Update the string that clears the console.

#1914
I've tested it with Windows 10 and 7, node versions from ~5.0.0 up to 7.7.0.
Didn't managed to test it on 8 but it should be fine.

* Update windows string

Add windows specific string for clearing the console.

* add support to set REACT_EDITOR to none

* change README message

* change condition to avoid problems with editor being null

* move condition to avoid extra code

* Update README.md with a note that reminds users to prepend REACT_APP_ to their environment variables. 
* Based on #865, where Dan Abramov suggests the person who filed the issue create a PR with these changes.
* Took the language from [Adding Custom Environment Variables](https://github.com/facebookincubator/create-react-app/tree/master/packages/react-scripts/template#adding-custom-environment-variables)

Fixes #2793

Adds support for the error overlay to detect and open the file with the error in MacVim.

Relates to #2636.

Add TypeScript to **Popular Alternatives**