chore: fix issues

.eslintrc.cjs

@@ -95,6 +95,16 @@ module.exports = defineConfig({
       { blankLine: 'always', prev: 'block-like', next: '*' },
     ],
     '@typescript-eslint/prefer-regexp-exec': 'error',
+    '@typescript-eslint/restrict-plus-operands': [
+      'error',
+      {
+        allowAny: false,
+        allowBoolean: false,
+        allowNullish: false,
+        allowNumberAndString: true,
+        allowRegExp: false,
+      },
+    ],
     '@typescript-eslint/restrict-template-expressions': [
       'error',
       { allowNumber: true, allowBoolean: true },
@@ -106,13 +116,6 @@ module.exports = defineConfig({
     '@typescript-eslint/unbound-method': 'off',
     '@typescript-eslint/unified-signatures': 'off', // incompatible with our api docs generation
 
-    '@typescript-eslint/restrict-plus-operands': [
-      'error',
-      {
-        allowNumberAndString: true
-      },
-    ],
-
     // TODO @ST-DDT 2023-10-10: The following rules currently conflict with our code.
     // Each rule should be checked whether it should be enabled/configured and the problems fixed, or stay disabled permanently.
     '@typescript-eslint/no-confusing-void-expression': 'off',

test/faker.spec.ts

@@ -16,9 +16,7 @@ describe('faker', () => {
   it('should not log anything on startup', async () => {
     const spies: MockInstance[] = keys(console)
       .filter((key) => typeof console[key] === 'function')
-      .map((methodName) =>
-        vi.spyOn(console, methodName as keyof typeof console)
-      );
+      .map((methodName) => vi.spyOn(console, methodName));
 
     (await import('..')).default;