pip is now emitting a warning on appveyor, which appears to break powershell...

pip is now emitting a warning on appveyor, which appears to break powershell installing twine, and hence uploads.

appveyor.yml

@@ -194,7 +194,7 @@ after_test:
   # https://ci.appveyor.com/project/denik/gevent/builds/23810605/job/83aw4u67artt002b#L602
   # So we violate DRY and repeate some requirements in order to use
   # --no-build-isolation
-  - "%CMD_IN_ENV% %PYEXE% -m pip install --pre wheel cython setuptools cffi"
+  - "%CMD_IN_ENV% %PYEXE% -m pip install --pre wheel cython setuptools cffi twine"
   - "%CMD_IN_ENV% %PYEXE% -m pip wheel --no-build-isolation . -w dist"
   - ps: "ls dist"
 
@@ -204,6 +204,6 @@ artifacts:
 
 
 deploy_script:
-  - ps: if ($env:APPVEYOR_REPO_TAG -eq $TRUE) { pip install twine; twine upload --skip-existing dist/gevent* }
+  - ps: if ($env:APPVEYOR_REPO_TAG -eq $TRUE) { twine upload --skip-existing dist/gevent* }
 
 deploy: on

scripts/releases/geventreleases.sh

@@ -8,20 +8,20 @@ mkdir /tmp/gevent/
 
 
 # 2.7 is a python.org build, builds a 10_6_intel wheel
-./geventrel.sh /usr/local/bin/python2.7 &
+./geventrel.sh /usr/local/bin/python2.7 
 
 # 3.5 is a python.org build, builds a 10_6_intel wheel
-./geventrel.sh /usr/local/bin/python3.5 &
+./geventrel.sh /usr/local/bin/python3.5 
 
 # 3.6 is a python.org build, builds a 10_6_intel wheel
-./geventrel.sh /usr/local/bin/python3.6 &
+./geventrel.sh /usr/local/bin/python3.6 
 
 # 3.7 is a python.org build, builds a 10_6_intel wheel
-./geventrel.sh /usr/local/bin/python3.7 &
-./geventrel.sh /usr/local/bin/python3.8 &
+./geventrel.sh /usr/local/bin/python3.7 
+./geventrel.sh /usr/local/bin/python3.8 
 
 
 # PyPy 4.0
-./geventrel.sh `which pypy` &
+./geventrel.sh `which pypy` 
 
 wait