Update deps

Had to downgrade babel-eslint because apparently that broke quite seriously.
Will have to see on upcoming dependabot merges if things got better again

Author: eFrane

docs/.vuepress/components/Mermaid.vue

@@ -1,5 +1,5 @@
 <script>
-import mermaid from 'mermaid/src/mermaidAPI'
+import mermaid from 'mermaid'
 
 let graphIdCounter = 0
 

package.json

@@ -30,7 +30,7 @@
   "devDependencies": {
     "autoprefixer": "^9.6.1",
     "babel-core": "^6.22.1",
-    "babel-eslint": "^10.0.2",
+    "babel-eslint": "8.0.0",
     "babel-helper-vue-jsx-merge-props": "^2.0.3",
     "babel-jest": "^21.0.2",
     "babel-plugin-dynamic-import-node": "^1.2.0",