Cut v1.2.0

One might argue that supporting the newest Pushgateway is just an
enhancement or even a bugfix (and this should be v1.1.1, which would
be a really nice version number). I decided to go for a positive view
of things and call it a feature. If something else changes its
behavior, it's not really a bug from client_golang's point of view.

Signed-off-by: beorn7 <[email protected]>

Author: beorn7

CHANGELOG.md

@@ -1,3 +1,10 @@
+## 1.2.0 / 2019-10-15
+
+* [FEATURE] Support pushing to Pushgateway v0.10+. #652
+* [ENHANCEMENT] Improve hashing to make a spurious `AlreadyRegisteredError` less likely to occur. #657
+* [ENHANCEMENT] API client: Add godoc examples. #630
+* [BUGFIX] promhttp: Correctly call WriteHeader in HTTP middleware. #634
+
 ## 1.1.0 / 2019-08-01
 
 * [CHANGE] API client: Format time as UTC rather than RFC3339Nano. #617

VERSION

@@ -1 +1 @@
-1.1.0
+1.2.0