Switch to Yarn Workspaces (#3755)

* Switch to Yarn Workspaces

* Feedback

* Move flowconfig

* Use publish script

* Keep git status check

* Fix Flow without perf penalty

* Remove Flow from package.json "test"

* Try running it from script directly (?)

* Try magic incantations

* lol flow COME ON

* Try to skip Flow on AppVeyor

* -df

* -df

* -df

* Try to fix CI

* Revert unrelated changes

* Update CONTRIBUTING.md

packages/react-error-overlay/.flowconfig

@@ -1,9 +1,15 @@
-[ignore]
-.*/node_modules/eslint-plugin-jsx-a11y/.*
-
 [include]
-src/**/*.js
+<PROJECT_ROOT>/src/**/*.js
+
+[ignore]
+.*/node_modules/.*
+.*/.git/.*
+.*/__test__/.*
+.*/fixtures/.*
 
 [libs]
+flow/
 
 [options]
+module.file_ext=.js
+sharedmemory.hash_table_pow=19

packages/react-error-overlay/flow/env.js

@@ -0,0 +1,19 @@
+declare module 'anser' {
+  declare module.exports: any;
+}
+
+declare module 'babel-code-frame' {
+  declare module.exports: any;
+}
+
+declare module 'html-entities' {
+  declare module.exports: any;
+}
+
+declare module 'settle-promise' {
+  declare module.exports: any;
+}
+
+declare module 'source-map' {
+  declare module.exports: any;
+}

packages/react-error-overlay/package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "prepublishOnly": "npm run build:prod && npm test",
     "start": "cross-env NODE_ENV=development node build.js --watch",
-    "test": "flow && cross-env NODE_ENV=test jest",
+    "test": "cross-env NODE_ENV=test jest",
     "build": "cross-env NODE_ENV=development node build.js",
     "build:prod": "cross-env NODE_ENV=production node build.js"
   },