Update fow + fixes/workarounds

.flowconfig

@@ -1,5 +1,5 @@
 [version]
-^0.68.0
+^0.87.0
 
 [ignore]
 .*/__tests__/_output/.*

examples/react-app-blog/src/PageRepositories.js

@@ -168,7 +168,7 @@ function getPagesProps(
   first?: number,
   last: number,
 |} {
-  const link = res.headers.get("Link") || res.headers.get("link");
+  const link = res.headers.get("Link") || res.headers.get("link") || "";
   const almostParams = link.split(/(page=\d+>; rel="[a-z]+)"/);
   const pages = {};
   for (let i = 1; i < almostParams.length; i = i + 2) {

flow-typed/handmade/find-cache-dir.js

@@ -1,12 +1,12 @@
-type findCacheDirOptions = {
-  name: string,
-  files: Array<string>,
-  cwd: string,
-  create: boolean,
-  thunk: boolean,
-};
+type findCacheDirOptions = {|
+  name?: string,
+  files?: Array<string>,
+  cwd?: string,
+  create?: boolean,
+  thunk?: boolean,
+|};
 
 declare module "find-cache-dir" {
   declare function findCacheDir(options: findCacheDirOptions): string;
-  declare module.exports: findCacheDir;
+  declare module.exports: typeof findCacheDir;
 }

flow-typed/handmade/fs-promise.js

@@ -3,8 +3,8 @@ declare module "fs-promise" {
   declare function mkdirs(path: string): Promise<any>;
 
   declare interface fsPromise {
-    writeFile: writeFile;
-    mkdirs: mkdirs;
+    writeFile: typeof writeFile;
+    mkdirs: typeof mkdirs;
   }
   declare module.exports: fsPromise;
 }

flow-typed/handmade/lru-memoize.js

@@ -1,5 +1,5 @@
 declare module "lru-memoize" {
   declare function memoizeInstance(func: Function): Function;
-  declare function memoize(num: number): memoizeInstance;
-  declare module.exports: memoize;
+  declare function memoize(num: number): typeof memoizeInstance;
+  declare module.exports: typeof memoize;
 }

flow-typed/handmade/node-object-hash.js

@@ -8,7 +8,7 @@ type NodeObjectHashConfig = {
 declare function hash(obj: Object): string;
 
 type NodeObjectHashInstance = {
-  hash: hash,
+  hash: typeof hash,
 };
 
 declare module "node-object-hash" {

flow-typed/handmade/webpack.js

@@ -1,22 +1,4 @@
 /* eslint-disable */
-// @todo improve this
-
-export type WebpackConfig = Object;
-
-export type WebpackAssetsFiles = { [key: string]: Array<string> };
-
-type WebpackInstance = {
-  query: Object,
-  options: Object,
-  emitError: Function,
-  emitFile: Function,
-  resourcePath: string,
-};
-
-declare module "webpack" {
-  declare function webpack(options: Object, callback: Function): void;
-  declare module.exports: webpack;
-}
 
 declare var module: {
   hot: {