Merge branch 'linter' into 'master'

Linter

See merge request !1

.eslintrc.yml

+env:
+  browser: true
+  es2021: true
+extends:
+  - 'plugin:react/recommended'
+  - airbnb
+parser: '@typescript-eslint/parser'
+parserOptions:
+  ecmaFeatures:
+    jsx: true
+  ecmaVersion: 12
+  sourceType: module
+plugins:
+  - react
+  - '@typescript-eslint'
+rules: {}

.npmrc

+package-lock=false

package.json

@@ -39,5 +39,15 @@
       "last 1 firefox version",
       "last 1 safari version"
     ]
+  },
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^4.18.0",
+    "@typescript-eslint/parser": "^4.18.0",
+    "eslint": "^7.22.0",
+    "eslint-config-airbnb": "^18.2.1",
+    "eslint-plugin-import": "^2.22.1",
+    "eslint-plugin-jsx-a11y": "^6.4.1",
+    "eslint-plugin-react": "^7.22.0",
+    "eslint-plugin-react-hooks": "^4.2.0"
   }
 }