Back to development (#921)

<!--
Before submitting your PR, please read through the contribution guide!


https://github.com/connectrpc/connect-go/blob/main/.github/CONTRIBUTING.md
-->

Signed-off-by: Edward McFarlane <emcfarlane@buf.build>

Author: emcfarlane

connect.go

@@ -33,7 +33,7 @@ import (
 )
 
 // Version is the semantic version of the connect module.
-const Version = "1.19.2"
+const Version = "1.20.0-dev"
 
 // These constants are used in compile-time handshakes with connect's generated
 // code.