v1.0.3

Changelog

• b0c0689 Merge pull request #3 from wbollock/fix/concurrency_lock
• d8c9ed4 chore: reduce unneeded lock
• a3b996e fix: scope metric variables to collector function
• 652caf4 ref: de-globalize server variables
• 1dfd63e ref: define PingMetrics type
• ae96e91 ref: make ping timeout and failed info msgs
• 4450fb3 ref: register metrics and lock outside collector
• ea7e384 ref: use namespace opt