Enhance toList and add toSet in CollectionUtil

[Linary]

No description provided.

[codecov]

Codecov Report

Merging #25 into master will increase coverage by 0.14%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master      #25      +/-   ##
============================================
+ Coverage     72.87%   73.02%   +0.14%     
- Complexity      438      442       +4     
============================================
  Files            44       44              
  Lines          1508     1516       +8     
  Branches        228      229       +1     
============================================
+ Hits           1099     1107       +8     
  Misses          302      302              
  Partials        107      107

Impacted Files	Coverage Δ	Complexity Δ
...ava/com/baidu/hugegraph/version/CommonVersion.java	50% <ø> (ø)	1 <0> (ø)	⬇️
.../java/com/baidu/hugegraph/util/CollectionUtil.java	84.53% <100%> (+1.39%)	31 <6> (+4)	⬆️
.../main/java/com/baidu/hugegraph/perf/Stopwatch.java	85.71% <0%> (-2.05%)	20% <0%> (-1%)
.../main/java/com/baidu/hugegraph/event/EventHub.java	81.94% <0%> (+1.38%)	27% <0%> (+1%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0822dd9...2fc6c8d. Read the comment docs.