The publisher field is not recognized by pub and caused dart pub publish
--dry-run to exit 65. Publisher is configured on pub.dev, not in pubspec.
Also apply dart format to test file to fix Format CI job.
Add formatTime, calcSpa, SpaFormattedResult, SpaFormattedAnglesResult,
functionCode parameter for getSpa (spaZa/spaZaInc/spaZaRts/spaAll),
incidence field on SpaResult, and export all function code constants.
All 48 tests pass including numerical cross-validation against the NREL
SPA reference date (Golden CO, 2003-10-17) and surface incidence angle.
