Rdap

Added
- rir assignment status lookup
- python 3.10
Removed
- python 3.6

Fixed
- correctly find domains that start with "as",

Fixed
- bootstrap not found errors throw RdapNotFoundError
Changed
- poetry lock

Added
- option to ignore recurse errors
- option to self bootstrap
- add config option for bootstrap_dir
Removed
- python 2 cruft

Added
- python 3.9
Fixed
- ignore not found on nested handle lookups
Changed
- improved exception message for unallocated ASNs
Removed
- python 3.5

Fixed
- better range check for unallocated ASNs