📦 Upgrade devDependencies (#153)

Upgrades all dev packages to their latest, and
updates the eslint config to use the new
`@typescript-eslint` parser & plugin.

Author: stormwarning

.eslintrc.js

@@ -1,6 +1,6 @@
 module.exports = {
-    parser: 'typescript-eslint-parser',
+    parser: '@typescript-eslint/parser',
+    plugins: ['@typescript-eslint'],
     extends: ['@zazen/eslint-config'],
-    plugins: ['typescript'],
     rules: {},
 }