build: update to Bazel v0.27.0 (#3824)

diff --git a/.bazelversion b/.bazelversion
index 30f6cf8..1b58cc1 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-0.26.1
+0.27.0
diff --git a/version.bzl b/version.bzl
index 982fab9..e2984db 100644
--- a/version.bzl
+++ b/version.bzl
@@ -2,7 +2,7 @@
 MIN_VERSION = "0.26.0"
 
 # Maximum supported Bazel version.  Should match .bazelversion file.
-MAX_VERSION = "0.26.1"
+MAX_VERSION = "0.27.0"
 
 def _tuplicate(value, delim):
     rv = ()