React-native-web: 0.12 release candidates

[necolas]

I published 0.12.0-rc.1 which has all the changes that are likely to go into 0.12.0 unless issues are spotted. The possible exception being the issue left in the 0.12 milestone but I'll need to check a possible change in IE11 and then have people check their app layouts didn't break.

cc @EvanBacon @paularmstrong @comp615 @brunolemos

[brunolemos]

I noticed only one small layout issue. The placeholderTextColor is not working:

And because of the ToolbarAndroid removal I had to make this PR: https://github.com/software-mansion/react-native-gesture-handler/pull/888

[necolas]

@EvanBacon I won't be maintaining RN deprecated APIs in RNW anymore, so if Expo users need to rely on deprecated exports like ViewPropTypes you will either need to provide them yourselves or use babel-plugin-transform-react-remove-prop-types in the webpack config to strip PropTypes from dependencies.

[vladp]

We just a test upgrade from RNW 0.11.7 to 0.12.0-rc1.

The code base is close to 30K lines (so not small and not big). For RN we use 0.60

We are reasonably conservative users of RN/RNW so no special/unusual usage.
But was happy to see that things like flatlist, buttons and other 'easy-but-useful' RN apis remained in RNW 0.12.

We also use several RN-but-works-on-RNW packages like react-native-fit-image, react-native-vector-icons, expo, expo-av, and a few others.

Out of the above, the only problem was expo/expo-av due to ViewPropTypes mentioned above, and react-native-calendars (due to same).

Temporarily, we removed expo-av from the code base and dropped back to browser's < audio > tag (and disabled calendars).

There were no other problems at all.

So thank you @necolas for making this upgrade easy.

Hoping that expo team can address the ViewPropTypes issue.

We also saw reduction of gzipped code size after the migration (10kb saving.. which is pretty good), compared to RN 11.7

rnw -0.12.0-rc1
  276.11 KB  build\static\js\2.dbdd813d.chunk.js
  77.88 KB   build\static\js\main.b75b01a6.chunk.js
  23.73 KB   build\static\css\2.42c6d710.chunk.css
  736 B      build\static\js\runtime-main.049aa418.js
  705 B      build\static\css\main.9ad727fb.chunk.css

rnw -0.11.7

  285.96 KB (+9.85 KB)  build\static\js\2.a91114c4.chunk.js
  77.8 KB (-81 B)       build\static\js\main.d0bd6c3e.chunk.js
  23.73 KB              build\static\css\2.42c6d710.chunk.css
  736 B                 build\static\js\runtime-main.049aa418.js
  705 B                 build\static\css\main.9ad727fb.chunk.css

[necolas]

Closed by 0.12.0 https://github.com/necolas/react-native-web/commit/dee418bb930fdeabfad8361a2fdc4247519638a9

[orestis-z]

babel-plugin-transform-react-remove-prop-types breaks StackView.tsx from react-navigation-stack