Add fully sketched out Parameter spec file

- The vast majority of these tests still need to be written.
  - But hey, they're there! 😛
1 job for 4-start-anew in 13 seconds (queued for 1 second)
Status Job ID Name Coverage
failed #1651


Name Stage Failure
test_lib-ical Test There is an unknown failure, please try again
      at Parameter.set paramValues [as paramValues] (src/Parameter.ts:89:19)
at new Parameter (src/Parameter.ts:36:25)
at (test/ContentLine.spec.ts:130:40)

npm info lifecycle lib-ics@0.0.1~test: Failed to exec test script
npm ERR! Test failed. See above for more details.
ERROR: Build failed: exit code 1