ci: fetch git repository without limits

- default depth=50 is to small to get the latest tag

Change-Id: I108f48865736c5afbd6e1e53648101a5f70701f8
Signed-off-by: Jacek Danecki <[email protected]>

Author: JacekDanecki

.travis.yml

@@ -4,7 +4,8 @@ compiler:
 sudo: required
 services:
     - docker
-
+git:
+    depth: false
 matrix:
     include:
         - os: linux