Update r 3.6 package version pins
Based on output of apt-cache madison r-base-core
MODIFY
repo2docker/buildpacks/r.py
repo2docker/buildpacks/r.py
@@ -73,9 +73,9 @@ class RBuildPack(PythonBuildPack):
"3.5.1": "3.5.1-2bionic",
"3.5.2": "3.5.2-1bionic",
"3.5.3": "3.5.3-1bionic",
- "3.6": "3.6.1-3bionic",
+ "3.6": "3.6.3-1bionic",
"3.6.0": "3.6.0-2bionic",
- "3.6.1": "3.6.1-3bionic",
+ "3.6.1": "3.6.1-1bionic",
"4.0": "4.0.5-1.1804.0",
"4.0.2": "4.0.2-1.1804.0",
"4.1": "4.1.2-1.1804.0",

Update r 3.6 package version pins

Based on output of apt-cache madison r-base-core