code-generators now marked to 3.8 spec (haskell#8134)

* code-generators now marked to 3.8 spec

* cg test vers

Co-authored-by: Gershom Bazerman <[email protected]>

Author: gbaz

Cabal-syntax/src/Distribution/PackageDescription/FieldGrammar.hs

@@ -322,7 +322,7 @@ testSuiteFieldGrammar = TestSuiteStanza
     <*> optionalField    "test-module"            testStanzaTestModule
     <*> blurFieldGrammar testStanzaBuildInfo buildInfoFieldGrammar
     <*> monoidalFieldAla "code-generators"        (alaList'  CommaFSep Token)     testStanzaCodeGenerators
-          ^^^ availableSince CabalSpecV3_6 [] -- TODO 3_8
+          ^^^ availableSince CabalSpecV3_8 []
 
 validateTestSuite :: Position -> TestSuiteStanza -> ParseResult TestSuite
 validateTestSuite pos stanza = case testSuiteType of

cabal-testsuite/PackageTests/TestCodeGenerator/my.cabal

@@ -1,4 +1,4 @@
-cabal-version:  3.6
+cabal-version:  3.8
 name:           my
 version:        0.1
 license:        BSD-3-Clause