Update osx_image and fix travis config warnings.

.travis.yml

@@ -60,6 +60,7 @@ jobs:
       env: PYENV_VERSION=pypy3.6-7.3.1 TOXENV=pypy3
     - &osx
       os: osx
+      osx_image: xcode12.2
       language: generic
       env: PYENV_VERSION=2.7.18 TOXENV=py27
     - <<: *osx
@@ -115,7 +116,7 @@ before_deploy:
 
 deploy:
   - provider: pypi
-    user: Ilya.Kulakov
+    username: Ilya.Kulakov
     password:
       secure: "fDYi/HJvYyqUggKmN/Dc6YewUsBAzHWBdTYMpDfHETeOIvv2G268atnIwcoWav63fwPUpagwOlzQhRklqeLRmjEzr4M+wzFsAQVAnj6a7ChLPWPmgZlClFRpm6leWZjzGD+1FPnH/vvwTHlDi7j+1zgfh4WEellnw3hU+Lzjx+o="
     distributions: "sdist bdist_wheel"
@@ -124,8 +125,8 @@ deploy:
       branch: master
       condition: $DEPLOY = 1
   - provider: releases
-    skip_cleanup: true
-    api_key:
+    cleanup: false
+    token:
       secure: "QHn7vzWo7rbgemP37qdNU4h+q7Xb2CQ7HxPFfa7yTsxFd8V4+sQLVrnaQtzYTM8dJWvRgi8PVHVGl2VGnQAiRM4Nd/NE/3HL9aHQIfWRtZ6XHfNVQ55bxJzLfZZy2M+32b8W268ELj3ty4C3Mo7TuOTv4svQoRDrLzGozJCpu+w="
     file_glob: true
     file: dist/*