Eslint explicit-module-boundary-types

.eslintrc.json

@@ -44,6 +44,7 @@
       { "allowExpressions": true }
     ],
     "@typescript-eslint/explicit-member-accessibility": "error",
+    "@typescript-eslint/explicit-module-boundary-types": "error",
     "@typescript-eslint/no-unused-vars": [
       "error",
       { "ignoreRestSiblings": true }