adding onnx support and average pooling

[coveralls]

Pull Request Test Coverage Report for Build 9501356186

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.007%) to 62.584%

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Files with Coverage Reduction	New Missed Lines	%
src/main/scala/com/johnsnowlabs/nlp/annotators/DateMatcherUtils.scala	2	86.57%
<!--	Total:	2		-->

Totals
Change from base Build 9483776689:	-0.007%
Covered Lines:	8962
Relevant Lines:	14320

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💛 - Coveralls