update version to 0.1.8 (microsoft#211)

2019-05-31, Version 0.1.7 (microsoft#160)

update version to 0.1.6 (microsoft#141)

* update version to 0.1.6

* fix lint error

2019-03-22, Version 0.1.5 (microsoft#110)

2019-03-04, Version 0.1.4 (microsoft#99)

2019-01-25, Version 0.1.3 (microsoft#83)

update version to 0.1.2 (microsoft#74)

* bump version to 0.1.2

* doc: update operator table

2018-12-04, Version 0.1.1 (microsoft#29)

Update ONNX.js to version 0.1.1

Initial commit of ONNX.js v0.1.0