version: release go-ethereum v1.15.8 stable

.travis.yml: remove macos build

version: release v1.15.6 stable

version: release v1.15.5 stable

version: release go-ethereum v1.15.4 stable

version: release go-ethereum v1.15.3 stable

version: release go-ethereum v1.15.2 stable

version: release go-ethereum v1.15.1 stable

version: release go-ethereum v1.15.0

version: release go-ethereum v1.14.13 stable