insertAll method should use orReplace argument rather than _orReplace flag.

[yohom]

I removed the _orReplace flag, and unified use orReplace parameters.
BTW, I think insertOrReplace method could be marked as Deprecated, because I add orReplace parameter in insert method too. You can do it later.

[codecov-io]

Codecov Report

Merging #17 into master will increase coverage by 0.04%.
The diff coverage is 92.59%.

@@            Coverage Diff             @@
##           master      #17      +/-   ##
==========================================
+ Coverage    80.2%   80.24%   +0.04%     
==========================================
  Files          53       53              
  Lines        1394     1392       -2     
==========================================
- Hits         1118     1117       -1     
+ Misses        276      275       -1

Impacted Files	Coverage Δ
moor/lib/src/runtime/statements/insert.dart	95.55% <92.59%> (+1.93%)	⬆️

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[simolus3]

Thanks!