botocore: 1.12.48 -> 1.12.62

boto3: 1.9.36 -> 1.9.62
awscli: 1.16.72

I update all three of these at a time because they rely on each other
and get annoyed when such changes are non-atomic. Also added a note to
the packages telling people that this is needed. I tested awscli and the
libraries against a real account.

pkgs/tools/admin/awscli/default.nix

@@ -19,11 +19,11 @@ let
 
 in py.pkgs.buildPythonApplication rec {
   pname = "awscli";
-  version = "1.16.60";
+  version = "1.16.72"; # N.B: if you change this, change botocore to a matching version too
 
   src = py.pkgs.fetchPypi {
     inherit pname version;
-    sha256 = "25bcc6cf2304356a78429671999857ff33f88761d81bcee63463a86a6780dcdc";
+    sha256 = "1ld4a6yxnh0v96fjjp8wjf7zvx41grl57mqg92p6zbfssr2jbqfv";
   };
 
   # No tests included
@@ -42,12 +42,6 @@ in py.pkgs.buildPythonApplication rec {
     less
   ];
 
-  postPatch = ''
-    for i in {py,cfg}; do
-      substituteInPlace setup.$i --replace "botocore==1.12.50" "botocore>=1.11,<1.13"
-    done
-  '';
-
   postInstall = ''
     mkdir -p $out/etc/bash_completion.d
     echo "complete -C $out/bin/aws_completer aws" > $out/etc/bash_completion.d/awscli