api: Catch up with GNU Smalltalk changes to >>#new

In master >>#new will call initialize but we don't want to call
>>#initialize before we have set some instance variables. Use the
>>#basicNew to avoid that.

src/BSCIPAConnection.st

@@ -45,7 +45,7 @@ Object subclass: BSCConnection [
 
     BSCConnection class >> createOn: aConfig msc: aMsc [
         <category: 'creation'>
-        ^ self new
+        ^ self basicNew
             instVarNamed: #config put: aConfig;
             instVarNamed: #msc put: aMsc;
             initialize;