Upgrade React Native to v0.59, from v0.57.

Fixes #3399!

The bulk of the work of this upgrade went into a large number of
commits previous to this one.  The majority of the last few dozen
commits, after 1c86488^, were part of the upgrade; some discussion
in #3561.  An earlier wave of effort focused on getting things working
with the upgrade of Flow to v0.92; see #3450 and especially f8c9810,
and then #3453 and #3442.  Some other early discussion is at #3422.

This commit itself was done mainly by running:

  $ tools/upgrade rn v0.59.10

Then, that tool needs a bit of an update for changes upstream.
Because I'm feeling pressed to get this upgrade out the door (and
to deal with the various separate trouble on iOS), I just took
care of the other relevant packages by hand: updated `@babel/core`
and `metro-react-native-babel-preset` in package.json according to
the diff seen in `rn-diff-purge`, then reran `yarn`.

Author: gnprice

.flowconfig

@@ -99,4 +99,4 @@ suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
 suppress_comment=\\(.\\|\n\\)*\\$FlowMigrationFudge
 
 [version]
-^0.81.0
+^0.92.0

package.json

@@ -44,9 +44,9 @@
     "lodash.unescape": "^4.0.1",
     "lodash.union": "^4.6.0",
     "lodash.uniqby": "^4.4.0",
-    "react": "16.6.3",
+    "react": "16.8.3",
     "react-intl": "^2.4.0",
-    "react-native": "0.57.8",
+    "react-native": "0.59.10",
     "react-native-device-info": "^0.21.5",
     "react-native-image-picker": "^0.26.10",
     "react-native-notifications": "^1.2.0",
@@ -63,7 +63,7 @@
     "react-navigation": "^1.5.12",
     "react-navigation-redux-helpers": "^1.1.1",
     "react-redux": "^5.0.7",
-    "react-test-renderer": "16.6.3",
+    "react-test-renderer": "16.8.3",
     "redux": "^4.0.0",
     "redux-action-buffer": "^1.2.0",
     "redux-batched-actions": "^0.3.0",
@@ -79,7 +79,7 @@
     "zulip-markdown-parser": "^1.0.5"
   },
   "devDependencies": {
-    "@babel/core": "^7.1.2",
+    "@babel/core": "^7.4.5",
     "babel-eslint": "^10.0.2",
     "babel-plugin-transform-remove-console": "^6.9.4",
     "deep-freeze": "^0.0.1",
@@ -95,12 +95,12 @@
     "eslint-plugin-react": "^7.14.2",
     "eslint-plugin-react-native": "^3.7.0",
     "eslint-plugin-spellcheck": "0.0.14",
-    "flow-bin": "^0.81.0",
+    "flow-bin": "^0.92.0",
     "flow-coverage-report": "^0.6.0",
     "flow-typed": "^2.4.0",
     "jest": "^24.8.0",
     "jest-cli": "^24.8.0",
-    "metro-react-native-babel-preset": "0.49.1",
+    "metro-react-native-babel-preset": "^0.54.1",
     "prettier": "^1.18.2",
     "prettier-eslint": "^9.0.0",
     "prettier-eslint-cli": "^5.0.0",