Upgrade to React Native 0.57.0

Both updrade tools failed to run:
 * react-native-git-upgrade
 * react-native upgrade

This will be a manual but thorough old-school upgrade.
Not a problem, since we did that already for all but the last upgrade.

First step is just to upgrade the dependencies and the flow config file.

We also replace "babel-preset-react-native" with "metro-react-native-babel-preset"
and then .babelrc changes to reflect that.

.babelrc

@@ -1,10 +1,10 @@
 {
- "presets": [
-   "react-native"
- ],
- "env": {
-   "production": {
-     "plugins": ["transform-remove-console"]
-   }
- }
-}
+  "presets": [
+    "module:metro-react-native-babel-preset"
+  ],
+  "env": {
+    "production": {
+      "plugins": ["transform-remove-console"]
+    }
+  }
+}

.flowconfig

@@ -56,6 +56,9 @@ sketchy-null
 [options]
 emoji=true
 
+esproposal.optional_chaining=enable
+esproposal.nullish_coalescing=enable
+
 include_warnings=true
 
 module.system=haste
@@ -94,4 +97,4 @@ suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
 suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
 
 [version]
-^0.75.0
+^0.78.0

package.json

@@ -44,9 +44,9 @@
     "lodash.unescape": "^4.0.1",
     "lodash.union": "^4.6.0",
     "lodash.uniqby": "^4.4.0",
-    "react": "16.4.1",
+    "react": "16.5.0",
     "react-intl": "^2.4.0",
-    "react-native": "0.56.1",
+    "react-native": "0.57.1",
     "react-native-device-info": "^0.21.5",
     "react-native-fetch-blob": "^0.10.8",
     "react-native-image-picker": "^0.26.10",
@@ -63,7 +63,7 @@
     "react-navigation": "^1.5.12",
     "react-navigation-redux-helpers": "^1.1.1",
     "react-redux": "^5.0.7",
-    "react-test-renderer": "16.4.1",
+    "react-test-renderer": "16.5.0",
     "redux": "^4.0.0",
     "redux-action-buffer": "^1.2.0",
     "redux-batched-actions": "^0.3.0",
@@ -80,9 +80,9 @@
   "devDependencies": {
     "babel-core": "^6.26.3",
     "babel-eslint": "^8.2.3",
-    "babel-jest": "^23.4.0",
+    "babel-jest": "^23.6.0",
     "babel-plugin-transform-remove-console": "^6.9.4",
-    "babel-preset-react-native": "^5",
+    "metro-react-native-babel-preset": "0.45.2",
     "coveralls": "^3.0.1",
     "deep-freeze": "^0.0.1",
     "detox": "^7.3.7",
@@ -98,7 +98,7 @@
     "eslint-plugin-react": "^7.8.2",
     "eslint-plugin-react-native": "^3.2.1",
     "eslint-plugin-spellcheck": "0.0.6",
-    "flow-bin": "0.75",
+    "flow-bin": "0.78",
     "flow-coverage-report": "^0.6.0",
     "flow-typed": "^2.4.0",
     "jest": "^23.4.0",