Bump up the version to 0.19.3
diff --git a/opencensus.go b/opencensus.go
index a52dcd8..2d9c089 100644
--- a/opencensus.go
+++ b/opencensus.go
@@ -17,5 +17,5 @@
 
 // Version is the current release version of OpenCensus in use.
 func Version() string {
-	return "0.20.0"
+	return "0.19.3"
 }