Show Pending in either Today's list of the Future list, but not both at the same time.

src/pitpkg/cliconstants.nim

@@ -1,4 +1,4 @@
-const PIT_VERSION* = "4.19.0"
+const PIT_VERSION* = "4.20.0"
 
 const USAGE* = """Usage:
   pit ( new | add) <summary> [<state>] [options]
@@ -166,4 +166,4 @@ Issue Properties:
 
       If present, expected to be a comma-delimited list of text tags. The -g
       option is a short-hand for '-p tags:<tags-value>'.
-"""
+"""