Compile against ppx_protocol_conv on 4.07

Author: andersfugmann

.travis.yml

@@ -13,7 +13,7 @@ env:
   - PACKAGE="ppx_protocol_conv" OCAML_VERSION=4.04
   - PACKAGE="ppx_protocol_conv" OCAML_VERSION=4.05
   - PACKAGE="ppx_protocol_conv" OCAML_VERSION=4.06
-
+  - PACKAGE="ppx_protocol_conv" OCAML_VERSION=4.07
   - PACKAGE="ppx_protocol_conv_json" OCAML_VERSION=4.07
   - PACKAGE="ppx_protocol_conv_msgpack" OCAML_VERSION=4.07
   - PACKAGE="ppx_protocol_conv_xml_light" OCAML_VERSION=4.07