dev-perl/BSON: Bump to version 1.6.7

dev-perl/BSON: Bump to version 1.6.7

Upstream:
- Validate Uint32 ranges on BSON::Timestamp components
- Adds comparison overloading to BSON::OID
- Adds create_oid class method
- Adds comparison overloading to BSON::Timestamp
- 'prefer_numeric' applies heuristic to dualvars only when no numeric
  form already exists
- epoch method on BSON::Time now floating point, not truncated to
  integer
- Fixed PID generation within OIDs
- Fix backwards compatible BSON::Timestamp constructor so
  MongoDB::Timestamp can be an empty subclass
- Add "bool" overloading for BSON::String to avoid fallback numification
  warnings
- Fix BSON::Time epoch conversion on perl w/ 64bit ints
- Improve BSON::Timestamp comparison to undef
- Prevent deprecation warnings from use of deprecated MongoDB v2 classes
  in test code
- Remove legacy tests for MongoDB::BSON::_EncodedDoc

Package-Manager: Portage-2.3.40, Repoman-2.3.9