Fix cyclic dependency that will cause pcln-icons tests to fail in future

[craigpalermo]

While working on #970, I noticed that pcln-icons tests failed after upgrading to pcln-design-system@^4.2.1. It was previously on pcln-design-system@^3, and upgrading seemed to cause an inexplicable error when running rush update related to an already existent symlink to packages/icons/node_modules/pcln-design-system/dist/cjs/index.js.

This PR includes the following changes:

• Upgrade to latest Rush and PNPM
• Use PNPM workspaces to resolve cyclic dependency issues
• Upgrade to latest pcln-design-system in devDeps of pcln-icons
• Update allowed peerDep of react and react-dom in babel-preset to match that of the rest of the packages in the repo. This mismatch was causing a React invalid hooks error when running tests for pcln-icons because there would be multiple versions of React in the dependency tree.
• Move require for @rushstack/eslint-patch to individual project .eslintrc.js files as recommended in their README

[codecov-io]

Codecov Report

Merging #995 (09e02ff) into master (1af0b8d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #995   +/-   ##
=======================================
  Coverage   91.94%   91.94%           
=======================================
  Files          86       86           
  Lines        1478     1478           
  Branches      287      287           
=======================================
  Hits         1359     1359           
  Misses         98       98           
  Partials       21       21           

Impacted Files	Coverage Δ
packages/icons/src/Svg.js	0.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1af0b8d...63d7027. Read the comment docs.

[sdalonzo]

As discussed, waiting to see the rush-lib bump as well as seeing if the snapshots calm down after a rebase.