sysutils/py-pkginfo: Update to 1.5.0.1

• Pet portlint by making the USES block separate while I'm here

Changelog since 1.4.2:

• Fix broken "sdist".
• Fix "console_scripts" entry point syntax.
• Add support for JSON output from the CLI.
• Add support for installed wheels. E.g., "dist-info/" dirs.
• Harden metadata extraction against unexpected encodings.
• Update tests to match pip/setuptools use of new metadata version.
• Add support for Python 3.6 and 3.7.
• Drop support for Python 3.3.

PR: 239784
Approved by: maintainer timeout (14 days)
MFH: 2019Q3