The Makefile doesn't install pg_rational--0.0.1--0.0.2.sql, but as it's empty
anyway, just revert the SQL version to 0.0.1.

--- a/pg_rational.control
+++ b/pg_rational.control
@@ -1,2 +1,2 @@
 comment = 'bigint fractions'
-default_version = '0.0.2'
+default_version = '0.0.1'
