docker: Pin version to 0.9.5

docker/Dockerfile

@@ -18,7 +18,7 @@ RUN apt-get install -y \
     zlib1g-dev
 RUN pip install -U future futures pandas pyfaidx pysam
 RUN pip install hmmlearn
-RUN pip install cnvkit==0.9.4
+RUN pip install cnvkit==0.9.5
 # Let matplotlib build its font cache
 RUN cnvkit.py version