v0.1.4

Changelog

• a568886 Add labels delete, make destructive commands strict by construction, and tell the skill how to link two cards
• eb9746a Add labels create, so a board's vocabulary can be extended from the CLI
• de368af Say why a destructive command refused, and report the list a card landed in

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Verify a download:

shasum -a 256 -c trello-cli_0.1.4_checksums.txt --ignore-missing

Run trello-cli contract for the envelope version and exit-code table this
build obeys, and trello-cli version for the build itself.