Allow base 4.17

qbe.cabal

@@ -52,6 +52,7 @@ library
     build-depends:    base              ^>= 4.16.1.0
                                      || ^>= 4.14
                                      || ^>= 4.15
+                                     || ^>= 4.17
                     , text              ^>= 1.2.5
                                      || ^>= 2.0
                     , text-short        ^>= 0.1