Upgrade Guava to 22.0

Hashing.sha1() is deprecated. Replace it with murmur3_128.

See the release notes for a full list of changes in this version.

https://github.com/google/guava/wiki/Release22

Change-Id: Iefc239ddc24f4773927c449252fca607d6fe7530

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 0b17e1a..ebfb757 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -28,8 +28,8 @@
 
 maven_jar(
     name = "guava",
-    artifact = "com.google.guava:guava:21.0",
-    sha1 = "3a3d111be1be1b745edfa7d91678a12d7ed38709",
+    artifact = "com.google.guava:guava:22.0",
+    sha1 = "3564ef3803de51fb0530a8377ec6100b33b0d073",
 )
 
 maven_jar(