Use double quotes in external_plugin_deps.bzl

Change-Id: Ia91c2974fa79a8ef912b5dd477585f2120ac49f5
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 53284f7..6289692 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -2,25 +2,25 @@
 
 def external_plugin_deps():
   maven_jar(
-    name = 'mockito',
-    artifact = 'org.mockito:mockito-core:2.5.0',
-    sha1 = 'be28d46a52c7f2563580adeca350145e9ce916f8',
+    name = "mockito",
+    artifact = "org.mockito:mockito-core:2.5.0",
+    sha1 = "be28d46a52c7f2563580adeca350145e9ce916f8",
     deps = [
-      '@byte_buddy//jar',
-      '@objenesis//jar',
+      "@byte_buddy//jar",
+      "@objenesis//jar",
     ],
   )
 
   maven_jar(
-    name = 'byte_buddy',
-    artifact = 'net.bytebuddy:byte-buddy:1.5.12',
-    sha1 = 'b1ba1d15f102b36ed43b826488114678d6d413da',
+    name = "byte_buddy",
+    artifact = "net.bytebuddy:byte-buddy:1.5.12",
+    sha1 = "b1ba1d15f102b36ed43b826488114678d6d413da",
     attach_source = False,
   )
 
   maven_jar(
-    name = 'objenesis',
-    artifact = 'org.objenesis:objenesis:2.4',
-    sha1 = '2916b6c96b50c5b3ec4452ed99401db745aabb27',
+    name = "objenesis",
+    artifact = "org.objenesis:objenesis:2.4",
+    sha1 = "2916b6c96b50c5b3ec4452ed99401db745aabb27",
     attach_source = False,
   )