Add mock library as dependency in Dockerfile.dev (#74)

Author: SiarheiFedartsou

docker/Dockerfile.dev

@@ -4,7 +4,7 @@ WORKDIR /tmp/smp/
 
 COPY ./requirements.txt /tmp/smp/requirements.txt
 RUN pip install -r requirements.txt
-RUN pip install pytest
+RUN pip install pytest mock
 
 COPY . /tmp/smp/
 RUN pip install .