Testnet4, release 2, post hard-fork

Actually cleanup old blocks if archive_mode=false (mimblewimble#1814)

* actually cleanup old blocks if not in archive mode

* rustfmt

fix: binary auto release feature broken (mimblewimble#1714)

* fix a mistake on script

 Replace rust-crypto with RustCrypto (mimblewimble#1573)

* Replace rust-crypto with RustCrypto

create a binary on tag

Testnet3 release version

testnet2 launch source tree