Merge commit '57a2259a00bf7ea3309faa231406df8e487ae792' into python-pip-replacement

* commit '57a2259a00bf7ea3309faa231406df8e487ae792':
  Use travis-ci provided python3 on Linux
  linux: transfer ownership of the wheel to the current user
  Update changelog
  Bump version
  macOS/Windows: Update setuptools
  Drop python 3.3 support on Linux
  macOS: update to python 2.7.15
  Renaming util.get_build_verbosity_flag into util.get_build_verbosity_extra_flags
  Bump version
  windows: upgrade pip with 'python -m pip'
  Fixing empty verbosity flag argument to `subprocess.check_call`
  Adding an to make the `pip wheel` invocation more or less verbose

cibuildwheel/util.py

@@ -12,6 +12,15 @@ def prepare_command(command, project):
     return command.format(python='python', pip='pip', project=project)
 
 
+def get_build_verbosity_extra_flags(level):
+    if level > 0:
+        return ['-' + level * 'v']
+    elif level < 0:
+        return ['-' + -level * 'q']
+    else:
+        return []
+
+
 class BuildSkipper(object):
     def __init__(self, skip_config):
         self.patterns = skip_config.split()