Fix jest typing

Author: CompuIves

packages/app/src/sandbox/eval/hmr.ts

@@ -20,12 +20,12 @@ export default class HMR {
     }
   }
 
-  setAcceptCallback(callback?: Function) {
+  setAcceptCallback(callback?: () => void) {
     this.callback = callback;
     this.setSelfAccepted(false);
   }
 
-  setDisposeHandler(callback: Function) {
+  setDisposeHandler(callback: () => void) {
     this.disposeHandler = callback;
   }
 

packages/app/src/sandbox/eval/transpiled-module.ts

@@ -141,9 +141,9 @@ type Compilation = {
   id: string;
   exports: any;
   hot: {
-    accept: Function | ((arg: string | string[], cb: Function) => void);
+    accept: (() => void) | ((arg: string | string[], cb: () => void) => void);
     decline: (path: string | Array<string>) => void;
-    dispose: (cb: Function) => void;
+    dispose: (cb: () => void) => void;
     data: Object;
     status: () => HMRStatus;
     addStatusHandler: (cb: (status: HMRStatus) => void) => void;
@@ -881,7 +881,7 @@ export default class TranspiledModule {
           }
           manager.enableWebpackHMR();
         },
-        dispose: (cb: Function) => {
+        dispose: (cb: () => void) => {
           this.hmrConfig = this.hmrConfig || new HMR();
 
           this.hmrConfig.setDisposeHandler(cb);

packages/common/src/types/index.ts

@@ -411,7 +411,9 @@ export type PackageJSON = {
   devDependencies?: {
     [dep: string]: string;
   };
-  jest?: object;
+  jest?: {
+    setupFilesAfterEnv?: string[];
+  };
   resolutions?: { [dependency: string]: string };
 };