elliptic-curve: bump sec1 to v0.8.0-rc.12#2209

tarcieri wants to merge 1 commit intomasterRustCrypto/traits:masterfrom

elliptic-curve/sec1-v0.8.0-rc.12RustCrypto/traits:elliptic-curve/sec1-v0.8.0-rc.12Copy head branch name to clipboard