v1.4.18

This is a maintenance release with bug fixes.

• Update elliptic dependency (#442)

• [FABN-1705] Allow multiple calls to Channel.sendTransaction. (#441)

• [FABN-1701] Align Fabric-Network discovery default options with code (#433)

• [FABN-1700] Fix HSMWalletMixin TypeDef (#428)

• [FABN-1591] Typo fix in release notes (#423)