Revert webapp/package.json yarn.lock

- upgrading tiptap introduces a breaking change to the tests for the editor
- issue reported here https://github.com/scrumpy/tiptap/issues/188

webapp/package.json

@@ -17,8 +17,6 @@
   },
   "jest": {
     "verbose": true,
-    "collectCoverage": true,
-    "coverageReporters": ["text", "lcov"],
     "moduleFileExtensions": [
       "js",
       "json",
@@ -53,8 +51,8 @@
     "nuxt-env": "~0.1.0",
     "stack-utils": "^1.0.2",
     "string-hash": "^1.1.3",
-    "tiptap": "^1.18.0",
-    "tiptap-extensions": "^1.18.1",
+    "tiptap": "^1.17.0",
+    "tiptap-extensions": "^1.17.0",
     "v-tooltip": "~2.0.2",
     "vue-count-to": "~1.0.13",
     "vue-izitoast": "1.1.2",
@@ -70,16 +68,16 @@
     "@vue/test-utils": "~1.0.0-beta.29",
     "babel-core": "~7.0.0-bridge.0",
     "babel-eslint": "~10.0.1",
-    "babel-jest": "~24.8.0",
+    "babel-jest": "~24.7.1",
     "eslint": "~5.16.0",
     "eslint-config-prettier": "~4.2.0",
     "eslint-loader": "~2.1.2",
     "eslint-plugin-prettier": "~3.0.1",
     "eslint-plugin-vue": "~5.2.2",
     "fuse.js": "^3.4.4",
-    "jest": "~24.8.0",
-    "node-sass": "~4.12.0",
-    "nodemon": "~1.19.0",
+    "jest": "~24.7.1",
+    "node-sass": "~4.11.0",
+    "nodemon": "~1.18.11",
     "prettier": "~1.14.3",
     "sass-loader": "~7.1.0",
     "tippy.js": "^4.3.0",