Remove postBuildScripts as this is optional

Author: George Nyakundi

boat-scaffold/src/main/templates/boat-swift5/XcodeGen.mustache

@@ -5,14 +5,11 @@ targets:
   {{projectName}}:
     type: framework
     platform: iOS
-    deploymentTarget: "14.0"
+    deploymentTarget: "15.0"
     sources: [{{projectName}}]
     info:
       path: ./Info.plist
       version: {{#podVersion}}{{podVersion}}{{/podVersion}}{{^podVersion}}{{#apiInfo}}{{version}}{{/apiInfo}}{{^apiInfo}}}0.0.1{{/apiInfo}}{{/podVersion}}
     scheme:
       testTargets:
-        - {{projectName}}IntegrationTests
-    postBuildScripts:
-      - path: ../../fix_swiftinterface.sh
-        name: Fix swiftinterface
+        - {{projectName}}IntegrationTests