Unpin dependencies after bumping MSRV to 1.70

[toidiu]

Problem:

A few dependencies are pinned until we update MSRV to at least 1.70

• home = "=0.5.5"
• tokio-macros = "=2.3.0"
• s2n-tls-hyper -> hyper -> h2 -> tokio-util "=0.7.11"
• unpin once_cell.
• unpin libloading = "=0.8.8" after MSRV is at least 1.71