Add release note item for new Monoid Const instance

See [6f3a194accd2a1a75a3f86c1b4dca30521488110/base]

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Remove deprecated _scc_ (#8170)
Add travis file
For now, sync stuff from the github mirror
Try to get happy and alex from Cabal
Fix typo
Try to condense build log output
Try non-fast validate (--fast took 40min, will likely fail)
Try without CPUS=3
CPUS=3 helps
Make travis build less verbose
Disable profiling libraries
More playing around with settings
We want Verbose=2 for travis (I believe)
.travis: Use SKIP_PERF_TESTS