v1.6.8

What's Changed

• chore: remove redundant field url2 by @r3inbowari in #161
• fix: parse uppercase for ping-mode flag by @r3inbowari in #161
• fix: unexpected division by a zero-length vector in stddeviation by @r3inbowari in #161
• chore: use http ping as default by @r3inbowari in #161
• fix: user agent is overwritten with empty string by @r3inbowari in #161
• fix(cli): panic when json failed to create by @r3inbowari in #161
• fix: use haversine formula to calculate creat-circle distance avoid precision overflow by @r3inbowari in #161
• chore: add haversine formula test by @r3inbowari in #161
• chore: unreachable lint by @r3inbowari in #161

Full Changelog: v1.6.7...v1.6.8