not sure why all the existing crates have gone so far out of date. i feel like generating bindings isn't that hard if you've done it before but can be a blocker for people who haven't so maybe this will help.

some of the existing crates had the -sys suffix but it didn't seem like they were actually checking for it on the system (i'm not sure that LMDB is installed by default on most systems anyway?) so opted to not use it.

chose to keep the version in step with LMDB (current looks like 0.9.70 in the lmdb.h).

will regenerate anytime i become aware of a version bump for LMDB.