Update requirements to branch

requirements-dev.txt were all pointing to master

Change-Id: I82e097228e7097e3026d9268b0cf96925d5563e0
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>

requirements-dev.in

@@ -13,5 +13,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-git+https://osm.etsi.org/gerrit/osm/IM.git@master#egg=osm-im
+git+https://osm.etsi.org/gerrit/osm/IM.git@v13.0#egg=osm-im
 -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v13.0

requirements-dev.txt

@@ -27,7 +27,7 @@ lxml==4.9.0
     #   -r https://osm.etsi.org/gitweb/?p=osm/IM.git;a=blob_plain;f=requirements.txt;hb=v13.0
     #   pyang
     #   pyangbind
-osm-im @ git+https://osm.etsi.org/gerrit/osm/IM.git@master
+osm-im @ git+https://osm.etsi.org/gerrit/osm/IM.git@v13.0
     # via -r requirements-dev.in
 pyang==2.5.3
     # via