devel/py-launchpadlib: Update to 1.10.13

• Indent RUN_DEPENDS to be in sync with the other variables while I'm here.

Notable changes since 1.10.7:

• Postpone keyring.errors import in the same way that we postpone importing keyring itself.
• Don't store credentials or open a browser window when running under sudo.
• Fall back to in-memory credentials store if no keyring backend is available.
• Fix AccessToken.from_string crash on Python 3.8.
• Explicitly install version.txt; launchpadlib requires it.

PR: 247223
Submitted by: fullermd@over-yonder.net (maintainer)