Firestore: Enable noImplicitThis in tsconfig. (#2068)

Author: Michael Lehenbauer

packages/firestore/test/util/equality_matcher.ts

@@ -87,7 +87,7 @@ export function addEqualityMatcher(): void {
       // eslint-disable-next-line @typescript-eslint/explicit-function-return-type
       const assertEql = (_super: (r: unknown, l: unknown) => boolean) => {
         originalFunction = originalFunction || _super;
-        return function(...args: unknown[]): void {
+        return function(this: unknown, ...args: unknown[]): void {
           if (isActive) {
             const [expected, msg] = args;
             utils.flag(this, 'message', msg);

packages/firestore/tsconfig.json

@@ -2,7 +2,6 @@
   "extends": "../../config/tsconfig.base.json",
   "compilerOptions": {
     "outDir": "dist",
-    "noImplicitThis": false,
     "strictBindCallApply": false,
     "strictPropertyInitialization": false
   },