Bump Linux dependencies

- Alpine 3.10.3
- Debian Stretch 20191118
- Python 3.7.5

Signed-off-by: Christopher Crone <[email protected]>

Dockerfile

@@ -1,9 +1,9 @@
-ARG DOCKER_VERSION=18.09.7
-ARG PYTHON_VERSION=3.7.4
+ARG DOCKER_VERSION=19.03.5
+ARG PYTHON_VERSION=3.7.5
 ARG BUILD_ALPINE_VERSION=3.10
 ARG BUILD_DEBIAN_VERSION=slim-stretch
-ARG RUNTIME_ALPINE_VERSION=3.10.1
-ARG RUNTIME_DEBIAN_VERSION=stretch-20190812-slim
+ARG RUNTIME_ALPINE_VERSION=3.10.3
+ARG RUNTIME_DEBIAN_VERSION=stretch-20191118-slim
 
 ARG BUILD_PLATFORM=alpine