Update dependencies

Eslint major version update requires new peer dependencies, which were added as devDependencies.
vue-i18 and core-js also updated

Signed-off-by: Olga Bulat <obulat@gmail.com>

Author: obulat

.eslintrc.js

@@ -3,14 +3,14 @@ module.exports = {
     env: {
         node: true
     },
-    'extends': [
+    extends: [
         'plugin:vue/essential',
         '@vue/standard'
     ],
     rules: {
         'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
         'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
-        'indent': ['error', 4],
+        indent: ['error', 4],
         'space-before-function-paren': ['warn', 'never']
     },
     parserOptions: {