Refactor timer driver

[fafhrd91]

No description provided.

[codecov]

Codecov Report

Patch coverage: 93.65% and no project coverage change.

Comparison is base (adb74ed) 90.77% compared to head (607cb70) 90.77%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #207   +/-   ##
=======================================
  Coverage   90.77%   90.77%           
=======================================
  Files         188      188           
  Lines       30538    30586   +48     
=======================================
+ Hits        27720    27765   +45     
- Misses       2818     2821    +3     

Impacted Files	Coverage Δ
ntex-util/src/time/mod.rs	97.08% <ø> (ø)
ntex-util/src/time/wheel.rs	94.08% <93.65%> (-0.04%)	⬇️

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