Support LiveView 0.19

What's Changed

• Fix get env warning. by @williamweckl in #140
• Add support for phoenix 1.7 verified routes by @ananthakumaran in #143
• Support LiveView 0.19 and upgrade to node18 by @ananthakumaran in #145

Breaking Changes

• Drop support for LiveView 0.17

Full Changelog: v0.13.0...v0.14.0