Upgrading package.py requirements

Upgrading gitpython from 2.11.1 to 3.1.0 because of incompatiblity

with actual version of gitdb2 (4.0.2)

Issue-ID: OOM-2344

Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>
Change-Id: Ibde20ee7f842858cb26f3ed4b45cb0339093a59f
diff --git a/build/requirements.txt b/build/requirements.txt
index 3954445..441b3fc 100644
--- a/build/requirements.txt
+++ b/build/requirements.txt
@@ -1,2 +1,2 @@
 docker>=3.7.2
-gitpython==2.1.11
+gitpython==3.1.0