Update pipenv-python-version to latest python 3.6 (#644)

* Update pipenv-python-version

* use latest versions in pipenv script

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

* Update pipenv-python-version

* 3.6.4

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

CHANGELOG.md

@@ -2,7 +2,10 @@
 
 # 125
 
-Set `PYTHONPATH` during collectstatic runs.
+Set `PYTHONPATH` during collectstatic runs, other updates.
+
+- Update Set `PYTHONPATH` during collectstatic runs.
+- Update Pipenv "3.6" to "3.6.4".
 
 # 124
 

bin/steps/pipenv-python-version

@@ -19,10 +19,10 @@ if [[ -f $BUILD_DIR/Pipfile ]]; then
             if [[ "$PYTHON" == "null" ]]; then
                 PYTHON=$(jq -r '._meta.requires.python_version' "$BUILD_DIR/Pipfile.lock")
                 if [ "$PYTHON" = 2.7 ]; then
-                    echo "python-2.7.14" > "$BUILD_DIR/runtime.txt"
+                    echo "$LATEST_2" > "$BUILD_DIR/runtime.txt"
                 fi
                 if [ "$PYTHON" = 3.6 ]; then
-                    echo "python-3.6.3" > "$BUILD_DIR/runtime.txt"
+                    echo "$LATEST_3" > "$BUILD_DIR/runtime.txt"
                 fi
             fi