feat(jquery-migrate): definitions for jquery-migrate plugin (#42689)

- definition file
- tests

https://github.com/jquery/jquery-migrate#migrate-plugin-api

Thanks!

types/jquery-migrate/index.d.ts

@@ -0,0 +1,42 @@
+// Type definitions for jquery-migrate 3.1
+// Project: https://github.com/jquery/jquery-migrate
+// Definitions by: Piotr Błażejewicz (Peter Blazejewicz) <https://github.com/peterblazejewicz>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="jquery" />
+
+interface JQueryStatic {
+    /**
+     * An array of string warning messages that have been generated by the code on the page,
+     * in the order they were generated. Messages appear in the array only once,
+     * even if the condition has occurred multiple times, unless jQuery.migrateReset() is called
+     * @default []
+     */
+    migrateWarnings: string[];
+
+    /**
+     * Set this property to `true` to prevent console warnings from being generated in the development version.\
+     * The `jQuery.migrateWarnings` array is still maintained when this property is set,
+     * which allows programmatic inspection without console output
+     * @default false
+     */
+    migrateMute: boolean;
+
+    /**
+     * Set this property to `false` if you want warnings
+     * but do not want stack traces to appear on the console.
+     * @default true
+     */
+    migrateTrace: boolean;
+
+    /**
+     * Indicates the version of Migrate in use
+     */
+    readonly migrateVersion: string;
+
+    /**
+     * This method clears the `jQuery.migrateWarnings` array and "forgets" the list of messages
+     * that have been seen already.
+     */
+    migrateReset(): void;
+}

types/jquery-migrate/jquery-migrate-tests.ts

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+// $ExpectType string[]
+jQuery.migrateWarnings;
+jQuery.migrateWarnings.length;
+jQuery.migrateMute = false;
+jQuery.migrateTrace = true;
+// $ExpectType void
+jQuery.migrateReset();
+// $ExpectType string
+jQuery.migrateVersion;

types/jquery-migrate/tsconfig.json

@@ -0,0 +1,24 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "DOM"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "jquery-migrate-tests.ts"
+    ]
+}

types/jquery-migrate/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }