Support timeout.refresh in node environments

[rgroothuijsen]

Purpose

Fix issue #187 by adding an actual implementation to refresh().

Background

Previously, refresh() was added to the timer API as an alternative to manually resetting timeouts via clearTimeout() and setTimeout(). However, while the interface itself was added, it remained a no-op function. This is confusing, since the presence of this function creates the expectation that the timer has been refreshed when it actually hasn't.

Solution

refresh() now clears the existing timeout and generates a new one with the same function and delay parameters, but a new ID.

[codecov]

Codecov Report

Merging #328 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #328      +/-   ##
==========================================
+ Coverage   93.11%   93.12%   +0.01%     
==========================================
  Files           1        1              
  Lines         552      553       +1     
==========================================
+ Hits          514      515       +1     
  Misses         38       38              

Flag	Coverage Δ
#unit	93.12% <100.00%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
src/fake-timers-src.js	93.12% <100.00%> (+0.01%)	⬆️

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[benjamingr]

Thanks, this looks correct.