feat: Add types for merge-objects (#41822)

Signed-off-by: Richie Bendall <richiebendall@gmail.com>

types/merge-objects/index.d.ts

@@ -0,0 +1,8 @@
+// Type definitions for merge-objects 1.0
+// Project: https://github.com/shevaroller/node-merge-objects#readme
+// Definitions by: Richie Bendall <https://github.com/Richienb>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function mergeObjects<T extends object, U extends object>(object1: T, object2: U): T & U;
+
+export = mergeObjects;

types/merge-objects/merge-objects-tests.ts

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+import mergeObjects = require("merge-objects");
+
+mergeObjects({ a: 1, b: [2, 3] }, { b: [4, 5], c: 6 }); // $ExpectType { a: number; b: number[]; } & { b: number[]; c: number; }

types/merge-objects/tsconfig.json

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

types/merge-objects/tslint.json

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+{ "extends": "dtslint/dt.json" }