Enable @typescript-eslint/explicit-function-return-type rule
diff --git a/.eslintrc.js b/.eslintrc.js
index b1db4eb..45ba3c7 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -103,7 +103,6 @@
       },
       plugins: ['@typescript-eslint'],
       rules: {
-        '@typescript-eslint/explicit-function-return-type': 'off',
         '@typescript-eslint/no-unused-vars': [
           'error',
           { argsIgnorePattern: '^_' },