message: fix(build-tools): Add missing dependency
  This dependency was missed when some code was moved in PR It
  wasn't found due to lerna's hoisting behavior.
diff: "dependencies": {
  "@fluid-tools/version-tools": "^0.6.0",
  "@fluidframework/bundle-size-tools": "^0.6.0",
  + "@rushstack/node-core-library": "^3.51.1",
  "async": "^3.2.0",
  "chalk": "^2.4.2",
  "commander": "^6.2.1",
  