[bazel] Bump bazel version

Author: shs96c

.bazelversion

@@ -1 +1 @@
-2.0.0
+2.2.0

WORKSPACE

@@ -10,11 +10,11 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "bazel_toolchains",
-    sha256 = "a653c9d318e42b14c0ccd7ac50c4a2a276c0db1e39743ab88b5aa2f0bc9cf607",
-    strip_prefix = "bazel-toolchains-2.0.2",
+    sha256 = "1342f84d4324987f63307eb6a5aac2dff6d27967860a129f5cd40f8f9b6fd7dd",
+    strip_prefix = "bazel-toolchains-2.2.0",
     urls = [
-        "https://github.com/bazelbuild/bazel-toolchains/releases/download/2.0.2/bazel-toolchains-2.0.2.tar.gz",
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/2.0.2.tar.gz",
+        "https://github.com/bazelbuild/bazel-toolchains/releases/download/2.2.0/bazel-toolchains-2.2.0.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/2.2.0.tar.gz",
     ],
 )