v0.16.0

What's Changed

• Add nonce() to ViewMethodBuilder by @hyche in #667
• Adjust must_use Lints by @nlordell in #698
• Update edition, dependencies and release new version by @vkgnosis in #718
• Make ethcontract-generate curl dependency optional by @vkgnosis in #721
• Support eip1559 by @vkgnosis and @sunce86 in #723
• Fix assert usage in tests by @vkgnosis in #724

Full Changelog: v0.15.4...v0.16.0