Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Update Gerrit API to 2.16.23
  Update Gerrit API to 3.0.13

Change-Id: I285d6c82bdc75adaf393a1a674b34dbb0d50a8d6

README.md

diff --git a/README.md b/README.md
index 3f0d7de..725a35d 100644
--- a/README.md
+++ b/README.md
@@ -36,9 +36,9 @@
 
 ```python
 load("@com_googlesource_gerrit_bazlets//:gerrit_api.bzl", "gerrit_api")
-gerrit_api(version = "3.0.9",
-           plugin_api_sha1 = "dbcadf2c198b1ee1b74678855e8e10b2c403de1f",
-           acceptance_framework_sha1 = "799cb104f2c0de4394528e38ad487557dd69bb49")
+gerrit_api(version = "3.1.6",
+           plugin_api_sha1 = "e57f6465c9805f568082bffffd61a2771f10d68a",
+           acceptance_framework_sha1 = "ebfd50383f8593678b451c81dbc332db8e8da188")
 ```
 
 If the version ends in `-SNAPSHOT`, the jars are consumed from the local
@@ -47,7 +47,7 @@
 
 ```python
 load("@com_googlesource_gerrit_bazlets//:gerrit_api.bzl", "gerrit_api")
-gerrit_api(version = "3.0.10-SNAPSHOT")
+gerrit_api(version = "3.1.7-SNAPSHOT")
 ```
 
 <a name="basic-example"></a>

gerrit_api.bzl

diff --git a/gerrit_api.bzl b/gerrit_api.bzl
index 2f856b2..0a81b35 100644
--- a/gerrit_api.bzl
+++ b/gerrit_api.bzl
@@ -7,9 +7,9 @@
 gerrit_api is rule for fetching Gerrit plugin API using Bazel.
 """
 
-def gerrit_api(version = "3.0.13",
-               plugin_api_sha1 = "fe1f0d3240a0b4d142c7de66730ad708debb9cd1",
-               acceptance_framework_sha1 = "cfbb9a315334d07fa9a120ee3dbfab0ceaf19265"):
+def gerrit_api(version = "3.1.8",
+               plugin_api_sha1 = "37256adca0b7cc5f337da7f3356a92c6af397476",
+               acceptance_framework_sha1 = "bbba2c0988d36d839ec77a505e705abf33683ff8"):
     gerrit_api_version(
         name = "gerrit_api_version",
         version = version,