jest libdef: Re-sync with upstream, before updating to 27

Done by pulling the 26 libdef afresh and reapplying our patches to
it.

Author: chrisbobbe

flow-typed/jest_v26.x.x.js

@@ -259,6 +259,9 @@ type DomTestingLibraryType = {
   // 5.x
   toHaveDisplayValue(value: string | string[]): void,
   toBeChecked(): void,
+  toBeEmptyDOMElement(): void,
+  toBePartiallyChecked(): void,
+  toHaveDescription(text: string | RegExp): void,
   ...
 };
 
@@ -847,11 +850,15 @@ type JestObjectType = {
    * Determines if the given function is a mocked function.
    */
   isMockFunction(fn: Function): boolean,
+  /**
+   * Alias of `createMockFromModule`.
+   */
+  genMockFromModule(moduleName: string): any,
   /**
    * Given the name of a module, use the automatic mocking system to generate a
    * mocked version of the module for you.
    */
-  genMockFromModule(moduleName: string): any,
+  createMockFromModule(moduleName: string): any,
   /**
    * Mocks a module with an auto-mocked version when it is being required.
    *
@@ -1057,11 +1064,20 @@ declare var it: {
    * @param {Function} Test
    * @param {number} Timeout for the test, in milliseconds.
    */
-  skip(
-    name: JestTestName,
-    fn?: (done: JestDoneFn) => ?Promise<mixed>,
-    timeout?: number
-  ): void,
+  skip: {|
+    (
+      name: JestTestName,
+      fn?: (done: JestDoneFn) => ?Promise<mixed>,
+      timeout?: number
+    ): void,
+    each(
+      ...table: Array<Array<mixed> | mixed> | [Array<string>, string]
+    ): (
+      name: JestTestName,
+      fn?: (...args: Array<any>) => ?Promise<mixed>,
+      timeout?: number
+    ) => void,
+  |},
   /**
    * Highlight planned tests in the summary output
    *