Add types for jest-plugin-set (#28712)

types/jest-plugin-set/index.d.ts

@@ -0,0 +1,6 @@
+// Type definitions for jest-plugin-set 2.9
+// Project: https://github.com/negativetwelve/jest-plugins/tree/master/packages/jest-plugin-set
+// Definitions by: Jonas Heinrich <https://github.com/jonasheinrich>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function set(name: string, block: () => void): void;

types/jest-plugin-set/jest-plugin-set-tests.ts

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+set('variableA', () => {});

types/jest-plugin-set/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "jest-plugin-set-tests.ts"
+    ]
+}

types/jest-plugin-set/tslint.json

@@ -0,0 +1,3 @@
+{
+  "extends": "dtslint/dt.json"
+}