Upgrading existing solution to evaluate SPFx 1.12.1 release candidate

Notes on evaluating SPFx 1.12.1 release candidate

Upgrading an existing solution to evaluate SPFx 1.12.1 RC

1. Modify the solution's SPFx package versions in package.json to latest 1.12.1-rc.x e.g. 1.12.1-rc.0.
2. SPFx >= 1.12.0 requires Gulp@4 for Node 12 & 14 compatibility. Modify the solution's gulp version to 4.0.2.
3. Run "npm install" or similar to install the new dependencies.
4. Modify gulpfile.js to include a re-alias of "gulp serve". NOTE: non-RC @microsoft/generator-sharepoint does this during project scaffold.

const build = require('@microsoft/sp-build-web');

var getTasks = build.rig.getTasks;
build.rig.getTasks = function () {
  var result = getTasks.call(build.rig);

  result.set('serve', result.get('serve-deprecated'));

  return result;
};

Other notes

• The dist/ folder can be cleaned using --clean CLI flag e.g. gulp bundle --clean.