* Modernize Whitespace token: basic lexer

* Modernize Whitespace token: bibtex lexer

* Modernize Whitespace token: boa lexer

* Modernize Whitespace token: capnproto lexer + new example

* Modernize Whitespace token: cddl lexer

* Modernize Whitespace token: chapel lexer

* Modernize Whitespace token: c_like lexer

* Modernize Whitespace token: configs lexer

* Modernize Whitespace token: console lexer

* Modernize Whitespace token: crystal lexer

* Modernize Whitespace token: csound lexer

* Modernize Whitespace token: css lexer

* Revert a change in basic lexer

The PR #1819 provides a tool to identify unique token types. This PR
aims to remove the most obvious cases of unicorn styles which are used
in a single lexer only.

* Add CDDL lexer (thanks to Fabian Neumann)

* Add CDDL to mappings

* Fix inline flag in CDDL regex

* Update AUTHORS

* Fix explosive backtracking

* Comment invalid CDDL syntax for automated tests

* Update following Georg Brandl's review

* Update tests for CDDL to new framework

* Pylint pass

* Update links to CDDL RFC

* Update copyright header

* Solve regexlint issues in CDDL parser

* Add link to CDDL in documentation