Upgrade Eslint (#1647)

* chore(eslint): upgrade eslint from v4.x to v5.x

* chore(eslint): upgrade eslint-plugin-vue-libs to 4.x

* chore(eslint): upgrade eslint-plugin-markdown to 1.x

* chore(eslint): upgrade eslint-plugin-flowtype to version 3.x

* chore(eslint): upgrade eslint and related dependencies from 5.x to 6.x

* chore(eslint): upgrade eslint from v6.x to 7.x w/ related plugins

* chore(eslint): move eslint to devDependencies

Author: AtofStryker

.eslintrc

@@ -10,11 +10,13 @@
     "flowtype"
   ],
   "extends": [
-    "plugin:vue-libs/recommended",
-    "plugin:flowtype/recommended"
+    "plugin:flowtype/recommended",
+    "plugin:vue-libs/recommended"
   ],
   "rules": {
     "template-curly-spacing" : "off",
+    "for-direction": "off",
+    "getter-return": "off",
     "no-debugger": 2,
     "no-proto": 0,
     "space-before-function-paren": 0,

package.json

@@ -30,10 +30,6 @@
     "conditional-specs": "^1.0.1",
     "conventional-changelog": "^3.1.12",
     "cross-env": "^5.0.0",
-    "eslint": "^4.18.1",
-    "eslint-plugin-flowtype": "^2.46.1",
-    "eslint-plugin-markdown": "^1.0.0-beta.6",
-    "eslint-plugin-vue-libs": "^2.1.0",
     "flow-bin": "^0.66.0",
     "lerna": "^3.20.2",
     "markdown-it-include": "^1.0.0",
@@ -68,13 +64,17 @@
     "@vue/babel-helper-vue-jsx-merge-props": "^1.0.0",
     "@vue/babel-preset-jsx": "^1.1.2",
     "@vue/composition-api": "^0.6.4",
-    "babel-eslint": "^9.0.0",
+    "babel-eslint": "^10.1.0",
     "babel-jest": "^26.0.1",
     "babel-loader": "^8.1.0",
     "commitizen": "^4.0.3",
     "core-js": "2",
     "css-loader": "^4.2.0",
     "cz-conventional-changelog": "^3.0.2",
+    "eslint": "^7.6.0",
+    "eslint-plugin-flowtype": "^5.2.0",
+    "eslint-plugin-markdown": "^1.0.2",
+    "eslint-plugin-vue-libs": "^4.0.0",
     "expect": "^26.2.0",
     "husky": "^3.1.0",
     "identity-obj-proxy": "^3.0.0",

test/specs/mounting-options/localVue.spec.js

@@ -181,7 +181,7 @@ describeWithShallowAndMount('options.localVue', mountingMethod => {
     () => {
       const ChildComponent = Vue.extend({
         render(h) {
-          h('p', this.$route.params)
+          return h('p', this.$route.params)
         }
       })
       const TestComponent = {