Bump minimum PPI version to 1.222

See guillaumeaubert#17

Author: oalders

dist.ini

@@ -7,13 +7,9 @@ copyright_year   = 2013
 [@Author::OALDERS]
 -remove = Test::Synopsis
 -remove = Test::TidyAll ; not sure why this is failing under dzil test
-;RewriteVersion::Transitional.allow_decimal_underscore = 1
 
 [StaticInstall]
 mode = auto
 
-;[@Git::VersionManager/RewriteVersion::Transitional]
-;allow_decimal_underscore = 1
-
-;[RewriteVersion::Transitional]
-;allow_decimal_underscore = 1
+[Prereqs / RuntimeRequires]
+PPI = 1.222