chore: bump flow to 0.94 (react-native-community#200)

Summary:
---------

It's usually better to be on the latest available :D 

Test Plan:
----------

Green CI

Author: thymikee

.flowconfig

@@ -42,6 +42,7 @@ module.ignore_non_literal_requires=true
 [lints]
 all=warn
 unnecessary-optional-chain=off
+dynamic-export=off
 
 # There is an ESLint rule for this
 unclear-type=off
@@ -64,4 +65,4 @@ untyped-import
 untyped-type-import
 
 [version]
-^0.87.0
+^0.94.0

package.json

@@ -24,7 +24,7 @@
     "chalk": "^2.4.2",
     "eslint": "^5.10.0",
     "eslint-plugin-prettier": "^3.0.1",
-    "flow-bin": "^0.87.0",
+    "flow-bin": "^0.94.0",
     "glob": "^7.1.3",
     "jest": "^24.0.0",
     "lerna": "^3.10.6",

packages/cli/src/cliEntry.js

@@ -119,7 +119,7 @@ const addCommand = (command: CommandT, ctx: ContextT) => {
       opt.command,
       opt.description,
       opt.parse || defaultOptParser,
-      typeof opt.default === 'function' ? opt.default(ctx) : opt.default
+      opt.default
     )
   );
 

packages/cli/src/core/getPackageConfiguration.js

@@ -10,6 +10,5 @@ import type { PackageConfigurationT } from './types.flow';
 export default function getPackageConfiguration(
   folder: string
 ): PackageConfigurationT {
-  // $FlowFixMe: Non-literal require
   return require(path.join(folder, './package.json')).rnpm || {};
 }

packages/cli/src/core/types.flow.js

@@ -18,7 +18,7 @@ export type LocalCommandT = {
     command: string,
     description?: string,
     parse?: (val: string) => any,
-    default?: ((ctx: ContextT) => mixed) | mixed,
+    default?: string | boolean | number,
   }>,
   examples?: Array<{
     desc: string,

packages/cli/src/server/util/launchChrome.js

@@ -8,9 +8,6 @@
  * @flow
  */
 
-/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
- * found when Flow v0.54 was deployed. To see the error delete this comment and
- * run Flow. */
 import opn from 'opn';
 import { execSync } from 'child_process';
 import logger from '../../util/logger';

packages/cli/src/util/loadMetroConfig.js

@@ -2,7 +2,6 @@
  * Configuration file of Metro.
  * @flow
  */
-import type { ConfigT } from 'metro-config/src/configTypes.flow';
 import path from 'path';
 import { createBlacklist } from 'metro';
 import { loadConfig } from 'metro-config';
@@ -90,7 +89,7 @@ export default async function load(
   ctx: ContextT,
   // $FlowFixMe - troubles with empty object being inexact
   options?: ConfigOptionsT = {}
-): Promise<ConfigT> {
+) {
   const defaultConfig = getDefaultConfig(ctx);
 
   const config = await loadConfig(

yarn.lock

@@ -3555,10 +3555,10 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flow-bin@^0.87.0:
-  version "0.87.0"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.87.0.tgz#fab7f984d8cc767e93fa9eb01cf7d57ed744f19d"
-  integrity sha512-mnvBXXZkUp4y6A96bR5BHa3q1ioIIN2L10w5osxJqagAakTXFYZwjl0t9cT3y2aCEf1wnK6n91xgYypQS/Dqbw==
+flow-bin@^0.94.0:
+  version "0.94.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.94.0.tgz#b5d58fe7559705b73a18229f97edfc3ab6ffffcb"
+  integrity sha512-DYF7r9CJ/AksfmmB4+q+TyLMoeQPRnqtF1Pk7KY3zgfkB/nVuA3nXyzqgsIPIvnMSiFEXQcFK4z+iPxSLckZhQ==
 
 flush-write-stream@^1.0.0:
   version "1.0.3"