versions: Update golang to 1.10.4

Move to golang version 1.10.4 -- the oldest stable golang release at the
time of writing -- since golang 1.10+ is needed to make namespace
handling safe.

See:

- golang/go#20676
- golang/go@2595fe7

Also bumped `languages.golang.meta.newest-version` to golang version
1.11, which is the newest stable release at the time of writing.

Fixes #148.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>

versions.yaml

@@ -183,9 +183,9 @@ languages:
   golang:
     description: "Google's 'go' language"
     notes: "'version' is the default minimum version used by this project."
-    version: "1.9.7"
+    version: "1.10.4"
     meta:
-      newest-version: "1.10"
+      newest-version: "1.11"
 
 specs:
   description: "Details of important specifications"