deps: bump webrtc from 0.6.0 to 0.7.2#146

dependabot[bot] wants to merge 1 commit intomasterthomaseizinger/rust-libp2p:masterfrom

dependabot/cargo/webrtc-0.7.2thomaseizinger/rust-libp2p:dependabot/cargo/webrtc-0.7.2Copy head branch name to clipboard