tide-panic http-server version incorrect

[WSeegers]

Bug Report

Current Behavior

The tide-panic module is currently using http-service = "2.0.0" while the rest of the crate is using http-service = "3.0.0". This is causing a failure to build on current nightly as a result changes to async/await.

Code/Gist

Expected behavior/code

Compilation without error.

Environment

• Rust toolchain version(s): nightly-x86_64-unknown-linux-gnu
• OS: Linux x86_64 GNU/Linux

Possible Solution

Change http-service = "3.0.0" for tide-panic

[WSeegers]

Corrected in #309