Remove deprecated "Smalltalk current".

Use just "Smalltalk". This is safe, as this is 0.13-aimed template.

root/src/name.st

@@ -1,4 +1,4 @@
-Smalltalk current createPackage: '{%= name %}'!
+Smalltalk createPackage: '{%= name %}'!
 Object subclass: #{%= name %}
 	instanceVariableNames: ''
 	package: '{%= name %}'!

root/src/test.st

@@ -1,4 +1,4 @@
-Smalltalk current createPackage: '{%= name %}-Tests'!
+Smalltalk createPackage: '{%= name %}-Tests'!
 TestCase subclass: #{%= name %}Test
 	instanceVariableNames: ''
 	package: '{%= name %}-Tests'!