Add methods to support waiting on directory event.

[boretti]

No description provided.

[codecov]

Codecov Report

Merging #21 into master will increase coverage by 0.27%.
The diff coverage is 95%.

@@             Coverage Diff             @@
##             master     #21      +/-   ##
===========================================
+ Coverage     98.63%   98.9%   +0.27%     
- Complexity       83      99      +16     
===========================================
  Files            11      13       +2     
  Lines           146     183      +37     
  Branches          5       4       -1     
===========================================
+ Hits            144     181      +37     
  Misses            1       1              
  Partials          1       1

Flag	Coverage Δ	Complexity Δ
#unitlinuxopenjdk10	98.9% <95%> (+0.27%)	99 <16> (+16)	⬆️
#unitlinuxopenjdk11	98.9% <95%> (+0.27%)	99 <16> (+16)	⬆️
#unitlinuxoraclejdk11	98.9% <95%> (+0.27%)	99 <16> (+16)	⬆️
#unitlinuxoraclejdk9	98.9% <95%> (+0.27%)	99 <16> (+16)	⬆️

Impacted Files	Coverage Δ	Complexity Δ
...unit/extensions/async/lang/WaitResultBuilder6.java	100% <100%> (+15.38%)	10 <1> (+1)	⬆️
...a/ch/powerunit/extensions/async/lang/WaitFile.java	100% <100%> (ø)	7 <7> (?)
...a/ch/powerunit/extensions/async/impl/FilePool.java	90% <90%> (ø)	8 <8> (?)

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[coveralls]

Coverage increased (+0.1%) to 99.454% when pulling e8bcc0a on wait-for-file into 7a2b322 on master.