Core Changes

• server doesn't need to be contenthashing at all: #25251
• Update postcss-loader to 4.3.0: #25197
• restore webpack defaults for managed/immutablePaths: #25250
• react-loadable-plugin. Handle undefined opts.caller: #25264

Documentation Changes

• doc(typescript.md) Mention incremental type checking: #25268

Misc Changes

• Ensure CNA install succeeds with npm and example flags: #25267
• Update output size test to handle version change: #25275
• Update the text for eslint/no-page-custom-font rule: #25117

Credits

Huge thanks to @sokra, @bradlc, @SinimaWath, and @rgabs for helping!