Fix ESLint

src/main/ts/.eslintrc.json

@@ -6,6 +6,9 @@
         "project": ["./tsconfig.json"],
         "sourceType": "module"
     },
+    "env": {
+        "es2020": true
+    },
     "plugins": [
         "@typescript-eslint"
     ],
@@ -43,6 +46,14 @@
                 "selector": "variable",
                 "format": ["camelCase", "UPPER_CASE"]
             },
+            {
+                "selector": "property",
+                "format": ["camelCase", "UPPER_CASE"]
+            },
+            {
+                "selector": "enumMember",
+                "format": ["UPPER_CASE"]
+            },
             {
                 "selector": "parameter",
                 "format": ["camelCase"]
@@ -70,6 +81,8 @@
         "@typescript-eslint/dot-notation": "error",
         "no-extra-semi": "off",
         "@typescript-eslint/no-extra-semi": "error",
-        "@typescript-eslint/explicit-function-return-type": "error"
+        "@typescript-eslint/explicit-function-return-type": "error",
+        "no-dupe-class-members": "off",
+        "@typescript-eslint/no-dupe-class-members": "error"
     }
 }