`--focus` would be nice to have

See #491, release log:

• f24c057 by @maxonfjvipon: bug(#491): grammar
• 95f5941 by @maxonfjvipon: bug(#491): latex
• a3e3267 by @maxonfjvipon: bug(#491): xmir
• 08a0bfb by @maxonfjvipon: bug(#491): context
• de48cfd by @maxonfjvipon: bug(#491): focus
• 1e1dc55 by @maxonfjvipon: bug(#560): help
• 564f068 by @maxonfjvipon: bug(#560): percentage
• 0923db8 by @maxonfjvipon: bug(#560): fourmolu
• 709a8f1 by @maxonfjvipon: bug(#560): match
• 754cf35 by @maxonfjvipon: bug(#560): meet length
• d7a614a by @maxonfjvipon: bug(#560): optional meet popul...
• bafad70 by @maxonfjvipon: bug(#561): fourmolu
• 29fcbab by @maxonfjvipon: bug(#561): popularity in latex
• 1d929ae by @maxonfjvipon: bug(#561): option
• 581ff19 by @maxonfjvipon: bug(#561): hlint
• 250f7a4 by @github-actions[bot]: new version in README

Released by Rultor 2.0-SNAPSHOT, see build log