Merge pull request SciTools#3198 from dkillick/version_string_v2.2.0

Update version string to v2.2.0

Updated to v2.1.0. (SciTools#3051)

v2.0.0

http:https://scitools.org.uk/iris/docs/v2.0/whatsnew/2.0.html

Converted the contributions into the whatsnew.

Merge pull request SciTools#2562 from lbdreyer/bump_version

Bump version to 1.13.0

Merge pull request SciTools#2332 from bjlittle/docs-template-copyrigh…

…t-year

Update template copyright year end

Release 1.12.0rc1 definition. (SciTools#2296)

* Release 1.12.0rc1 definition.

1.12.0rc0 version string

Whatsnew for v1.11.0 (SciTools#2250)

* Whatsnew for v1.11.0

Fix test runner override and no-data (SciTools#2242)