Apply suggestions from code review

Author: mseri

packages/awsm-codegen/awsm-codegen.0.1.0/opam

@@ -14,7 +14,7 @@ depends: [
   "core_unix"
   "ocamlformat"
   "ocamlgraph"
-  "ppxlib" {>= "0.26"}
+  "ppxlib" {>= "0.27"}
   "re" {>= "1.7.2"}
   "sedlex" {>= "2.3"}
   "xmlm"
@@ -31,7 +31,6 @@ build: [
     "-j"
     jobs
     "@install"
-    "@runtest" {with-test}
     "@doc" {with-doc}
   ]
 ]