v0.3.3: Dependency/Security update

This is another dependency update that addresses the HTTP/2 Rapid Reset Attack.
It is advised to update to v0.3.3.

What's Changed

• build(deps): bump github.com/labstack/echo/v4 from 4.11.1 to 4.11.2 by @dependabot in #60
• Update server.go by @wneessen in #61

Full Changelog: v0.3.2...v0.3.3