v0.8.0

• Deprecated parsing extensions of RequiredPick to acknowledge that all parsers eventually causes errors.
  From now on, always use .asIntOrThrow() instead of .required().asInt(). Only exception is .required().toString().
  Read more in #34
• Replace dynamic with Object where possible
• Rename Pick.location() to Pick.debugParsingExit
• Removal of PickLocaiton and PickContext mixins. They are now part of Pick
• RequiredPick now extends Pick making it easier to write parsers for custom types

This release is available as backport for Dart <2.12 with version 0.6.10