update packages and fix vue cli warning

[mpoqq]

Ref #123 #124

[xJREB]

The newest versions of each dependency are the following:

"dependencies": {
    "@fortawesome/fontawesome-svg-core": "^1.2.12",
    "@fortawesome/free-brands-svg-icons": "^5.6.3",
    "@fortawesome/free-regular-svg-icons": "^5.6.3",
    "@fortawesome/vue-fontawesome": "^0.1.5",
    "axios": "^0.18.0",
    "babel-runtime": "^6.26.0",
    "citation-js": "^0.4.0-11",
    "crossref": "^1.2.1",
    "material-design-icons-iconfont": "^4.0.4",
    "mathjs": "^5.4.1",
    "roboto-fontface": "^0.10.0",
    "vue": "^2.5.22",
    "vue-class-component": "^6.3.2",
    "vue-clipboard2": "^0.2.1",
    "vue-markdown": "^2.2.4",
    "vue-property-decorator": "^7.3.0",
    "vue-router": "^3.0.2",
    "vue-toasted": "^1.1.26",
    "vuetify": "^1.4.3"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "^3.3.0",
    "@vue/cli-plugin-typescript": "^3.3.0",
    "@vue/cli-service": "^3.3.1",
    "browser-request": "^0.3.3",
    "copy-webpack-plugin": "^4.6.0",
    "merge-jsons-webpack-plugin": "^1.0.18",
    "node-sass": "^4.11.0",
    "sass-loader": "^7.1.0",
    "sonarqube-scanner": "^2.1.2",
    "typescript": "^3.2.4",
    "vue-cli-plugin-vuetify": "^0.4.6",
    "vue-template-compiler": "^2.5.22"
  }

Please check these for breaking changes. I couldn't find any thing on a first manual test, but I may have missed stuff. Something something no tests... 😋

[mpoqq]

Ahhh I just updated my packages and not the file =) npm-check-updates did the job well =) I found no bugs with the new dependencies.