This indicates upwardly compatible changes, namely adding new symbols.
Although we don't formally need to do this until the next release,
there is no hard in doing it now, as long as we don't bump the minor
version for every addition between now and the release.
# the time of release for any additions to the library interface,
# (and when it is incremented, the release version of the library should
# be reset to 0).
-LIBNOTMUCH_VERSION_MINOR = 1
+LIBNOTMUCH_VERSION_MINOR = 2
# The release version the library interface. This should be incremented at
# the time of release if there have been no changes to the interface, (but