fix linting and update eslint rule (#946)

fixes #944

Author: eleanorjboyd

eslint.config.mjs

@@ -35,6 +35,6 @@ export default [{
         eqeqeq: "warn",
         "no-throw-literal": "warn",
         semi: "warn",
-        "@typescript-eslint/no-explicit-any": "warn",
+        "@typescript-eslint/no-explicit-any": "error",
     },
 }];

src/test/features/terminalEnvVarInjectorBasic.unit.test.ts

@@ -40,7 +40,11 @@ suite('TerminalEnvVarInjector Basic Tests', () => {
         };
 
         // Setup environment variable collection to return scoped collection
-        envVarCollection.setup((x) => x.getScoped(typeMoq.It.isAny())).returns(() => mockScopedCollection as any);
+        envVarCollection
+            .setup((x) => x.getScoped(typeMoq.It.isAny()))
+            .returns(
+                () => mockScopedCollection as unknown as ReturnType<GlobalEnvironmentVariableCollection['getScoped']>,
+            );
         envVarCollection.setup((x) => x.clear()).returns(() => {});
 
         // Setup minimal mocks for event subscriptions