internal/rosa: bind anitya functions

This is far more scalable than individual fields.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/package/perl.az

@@ -3,7 +3,7 @@ package perl {
 	website = "https://www.perl.org";
 	anitya = 13599;
 	// odd-even versioning
-	anityaFallback = true;
+	latest = anityaFallback;
 
 	version* = "5.42.2";
 	source = remoteTar {
@@ -86,7 +86,7 @@ package perl-SGMLS {
 	description = "class for postprocessing the output from the sgmls and nsgmls parsers";
 	website = "https://metacpan.org/release/RAAB/SGMLSpm-1.1";
 	anitya = 389576;
-	anityaLegacyCPAN = true;
+	latest = anityaLegacyCPAN;
 
 	version* = "1.1";
 	source = remoteCPAN {