docs(licence): update licence dates

4 jobs for branch/default in 4 minutes and 50 seconds (queued for 50 seconds)
Status Name Job ID Coverage
  Test
passed check-manifest #122529

00:00:26

passed flake8 #122530

00:00:59

passed py27 #122531

00:01:40

passed py3 #122532

00:01:44