params, swarm: release Geth v1.8.20 and Swarm v0.3.8

params, swarm: release Geth v1.8.19 and Swarm v0.3.7

params, swarm: release Geth v1.8.18 and Swarm v0.3.6

params, swarm: release Geth v1.8.17 and Swar v0.3.5

params, swarm: release Geth v1.8.16, Swarm v0.3.4

params, swarm: release geth v1.8.15 and swarm 0.3.3

params, swarm: release Geth v1.8.14 and Swarm v0.3.2

params, swarm/version: release Geth v1.8.13, Swarm 0.3.1

params: v1.8.12 stable

params: release go-ethereum v1.8.11