fix: eslint no-unused vars violations and setup

@typescript-eslint documents recommends turning off the base
unused-vars rule in eslint explicitly and using '@typescript-eslint/no-unused var'
instead. In this case, the base rule failed to correctly report enums. (reported
unused even though they were used).

Also, fixed two unused variables by adding ignore pattern '_'.

.eslintrc.json

@@ -116,7 +116,8 @@
     "no-unexpected-multiline": 2,
     "no-unneeded-ternary": [2, { "defaultAssignment": false }],
     "no-unreachable": 2,
-    "no-unused-vars": [2, { "vars": "local", "args": "none", "varsIgnorePattern": "^_" }],
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": [2, { "vars": "local", "args": "none", "varsIgnorePattern": "^_" }],
     "no-useless-call": 2,
     "no-useless-constructor": 2,
     "no-with": 2,

nip29.ts

@@ -144,7 +144,7 @@ export function validateGroupAdminsEvent(event: Event): boolean {
   }
 
   // validate permissions
-  for (const [tag, value, label, ...permissions] of event.tags) {
+  for (const [tag, _value, _label, ...permissions] of event.tags) {
     if (tag !== 'p') continue
 
     for (let i = 0; i < permissions.length; i += 1) {