v0.3.0

• now all opcodes can be parsed in the same line. (#4)
• now both midi note names and numbers can be parsed. (#5) thanks to @deermichel for both PRs!
• renamed from_str to from_name method in trigger, loop_mode and fil_type enums.
• misc. warning fixes & doc updates.
• derived several more std traits.
• updated dependencies.

Full Changelog: v.0.2.3...v0.3.0