v0.3.0

What's Changed

• fix(contract): known-types imports by @sinzii in #210
• feat(api): add block number to TxStatus by @sinzii in #212
• chore: bump dep versions by @sinzii in #216
• breaking: add find & filter methods to system & contract events by @sinzii in #211
• feat(contracts): add ReturnFlags by @1cedrus in #217
• chore(docs): update readme by @sinzii in #219

Full Changelog: v0.2.0...v0.3.0