[dist] Move spec prereqs from RuntimeRequires to DevelopRecommends to…

… reduce deps but still allow indicating spec requirement

dist.ini

@@ -10,8 +10,6 @@ remove=ShareDir
 :version=0.4.2
 
 [Prereqs]
-;!lint_prereqs assume-used # spec
-DefHash=1.0.6
 
 [Extras / lint-prereqs / assume-used]
 ; undetected by prereq scanner
@@ -22,3 +20,7 @@ Data::Dump::OneLine=0
 File::Slurp::Tiny=0
 ;YAML::XS=0
 JSON=0
+
+[Prereqs / DevelopRecommends]
+;!lint_prereqs assume-used # spec
+DefHash=1.0.6