Enable strict mode on hak tsconfig (#483)

scripts/hak/find-npm-prefix.d.ts

@@ -1,19 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-declare module "find-npm-prefix" {
-    export default function findPrefix(dir: string): Promise<string>;
-}

scripts/hak/node-pre-gyp.d.ts

@@ -1,20 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-declare module "node-pre-gyp/lib/util/versioning" {
-    // eslint-disable-next-line @typescript-eslint/naming-convention
-    export function get_runtime_abi(runtime: string, version: string): string;
-}