v0.9.0

New features

• Add option debug to compile the .ksy specs in --debug mode
  (tracking start and end offsets of parsed fields and removing the _read() call from the constructor - see #332)
• Support relative imports of other .ksy files specified by imports key in the main .ksy spec

Dependency updates

• kaitai-struct-compiler – from 0.7.1 to 0.9.0
• kaitai-struct – from 0.8.0-SNAPSHOT.2 to 0.9.0
• js-yaml – from 3.9.0 to 3.13.1 (security fixes)