Add eslint for Cypress tests

.eslintrc.json

@@ -0,0 +1,24 @@
+{
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "plugin:vue/essential",
+        "plugin:@typescript-eslint/recommended"
+    ],
+    "parserOptions": {
+        "ecmaVersion": 12,
+        "parser": "@typescript-eslint/parser",
+        "sourceType": "module"
+    },
+    "plugins": [
+        "vue",
+        "@typescript-eslint"
+    ],
+    "rules": {
+        "no-unused-vars": [ "off" ],
+        "@typescript-eslint/no-unused-vars": [ "off" ]
+    }
+}

cypress/support/component.ts

@@ -26,7 +26,7 @@ import { mount } from 'cypress/vue2'
 // Alternatively, can be defined in cypress/support/component.d.ts
 // with a <reference path="./component" /> at the top of your spec.
 declare global {
-  namespace Cypress {
+  namespace Cypress { //eslint-disable-line @typescript-eslint/no-namespace
     interface Chainable {
       mount: typeof mount
     }
@@ -36,4 +36,4 @@ declare global {
 Cypress.Commands.add('mount', mount)
 
 // Example use:
-// cy.mount(MyComponent)
+// cy.mount(MyComponent)