[pkg] relax deps pinning to allow build in ubuntu 18.04

debian/control

@@ -2,8 +2,8 @@ Source: riseup-vpn
 Section: net
 Priority: extra
 Maintainer: LEAP Encryption Access Project <debian@leap.se>
-Build-Depends: debhelper (>= 10.0.0), dh-golang, golang-go (>= 2:1.11~1),
-    golang-golang-x-text-dev (>= 0.3.0-2),
+Build-Depends: debhelper (>= 10.0.0), dh-golang, golang-go (>= 2:1.10),
+    golang-golang-x-text-dev,
     libgtk-3-dev, libappindicator3-dev, pkg-config
 Standards-Version: 3.9.8