hghave: prefill more version of Mercurial

The previous code was unable to go above version 4.0.

tests/hghave.py

@@ -247,7 +247,7 b' def gethgversion():'
     return (int(m.group(1)), int(m.group(2)))
 
 @checkvers("hg", "Mercurial >= %s",
-            list([(1.0 * x) / 10 for x in range(9, 40)]))
+            list([(1.0 * x) / 10 for x in range(9, 99)]))
 def has_hg_range(v):
     major, minor = v.split('.')[0:2]
     return gethgversion() >= (int(major), int(minor))