bump required Pod::To::HTML to 0.6.1

Author: finanalyst

META6.json

@@ -13,7 +13,7 @@
         "File::Temp",
         "JSON::Fast",
         "Pod::To::BigPage:ver<0.5.0+>",
-        "Pod::To::HTML:ver<0.4.1+>",
+        "Pod::To::HTML:ver<0.6.1+>",
         "OO::Monitors",
         "File::Find",
         "Test::META"