Leave compression up to people's own custom build setups

Closes #5127

The implementation is mostly copied from dart as implemented in
d4dbbcef.

Issue #5112

Issue #5112

 * Add reserved words for OCaml
 * Add {| |} string literal type
 * Add support for binary numbers
 * Add support for hex number literals
 * Add support for floats
 * Add octal and long integer literals

Closes #5101.

Closes #5110.

Closes #5102

The language is named "Objective-C" rather than "Objective C".

Reference:
https://en.wikipedia.org/wiki/Objective-C

Issue #5107

as per https://www.w3.org/TR/css-syntax-3/#rule-defs

Closes #5106

Closes #5095

Closes #5093

Issue #4792

See https://github.com/Microsoft/TypeScript/blob/6c4c10c7cf294dc71f943314e29a7dd1b6e88c6a/doc/spec.md#4.15.3

Issue #5090
Issue #5048

Closes #5048.

Closes #5084

Closes #5078

Closes #5075

Stop relying on mode tokens, use simple heuristic of not being after a word char

Issue #5058
Issue #2657

Issue #5063

Removing the broken links in the realworld users list. I checked the backlinks using,

https://www.deadlinkchecker.com/website-dead-link-checker.asp

and manually verified these urls to be invalid.

Closes #5064

Issue #5061

Closes #5059