Bump version to 1.2.0

Support reading gitlinks: https://gerrit-review.googlesource.com/c/gitiles/+/356514

Google-Bug-Id: b/261589090
Change-Id: I0f29a608be18d52baf3a6f8b7b1317f27f45a5ea

version.bzl

diff --git a/version.bzl b/version.bzl
index f634adb..e4bdfca 100644
--- a/version.bzl
+++ b/version.bzl
@@ -3,4 +3,4 @@
 # Used by :install and :deploy when talking to the destination repository.
 # Project uses semantic versioning described at:
 # https://semver.org
-GITILES_VERSION = "1.1.0"
+GITILES_VERSION = "1.2.0"