message: fix(core): regenerate yarn.lock file
diff: to-fast-properties "^2.0.0"
  "@backstage/core@^0.2.0":
  - version "0.2.0"
  - resolved "https://registry.npmjs.org/@backstage/core/-/core-0.2.0.tgz#543246b2d87563c9aa4d9fb96e40fdfc7e827520"
  - integrity sha512-75m2u3FoUngBOvt9l65xZcYTzzB+49OXpY1A9VNFUR1+jMs3cL/0HDfByQV2H0xXaHzMngQ8C5u/sWhkQsij1w==
  + version "0.3.0"
  dependencies:
  "@backstage/config" "^0.1.1"
  - "@backstage/core-api" "^0.2.0"
  - "@backstage/theme" "^0.2.0"
  + "@backstage/core-api" "^0.2.1"
  + "@backstage/theme" "^0.2.1"
  "@material-ui/core" "^4.11.0"
  "@material-ui/icons" "^4.9.1"
  "@material-ui/lab" "4.0.0-alpha.45"
  + "@types/dagre" "^0.7.44"
  "@types/react" "^16.9"
  "@types/react-sparklines" "^1.7.0"
  classnames "^2.2.6"
  clsx "^1.1.0"
  + d3-selection "^2.0.0"
  + d3-shape "^2.0.0"
  + d3-zoom "^2.0.0"
  + dagre "^0.8.5"
  immer "^7.0.9"
  lodash "^4.17.15"
  material-table "^1.69.1"
  prop-types "^15.7.2"
  + qs "^6.9.4"
  rc-progress "^3.0.0"
  react "^16.12.0"
  react-dom "^16.12.0"
  react-helmet "6.1.0"
  react-hook-form "^6.6.0"
  + react-markdown "^5.0.2"
  react-router "6.0.0-beta.0"
  react-router-dom "6.0.0-beta.0"
  react-sparklines "^1.7.0"
  react-syntax-highlighter "^13.5.1"
  react-use "^15.3.3"
  + remark-gfm "^1.0.0"
  "@bcoe/v8-coverage@^0.2.3":
  version "0.2.3"
  