stepcount 3.4.0

What's Changed

• feat: 95th percentile of cadence by @chanshing in #69
• fix(predict): handle zero-length X inputs by @chanshing in #70
• fix NoneType error by @chanshing in #71
• chore: silence warning 'Mean of empty slice' by @chanshing in #72
• feat: steps 5th & 95th ptiles at; refactor field names by @chanshing in #74
• fix: use only walking windows when calculating 95th cadence by @chanshing in #75
• feat: output minute-level data by @chanshing in #76
• feat: output enmo metrics by @chanshing in #77

Full Changelog: v3.3.1...v3.4.0