Change version number for release 1.7.0 (onnx#2768)

The release candidate 1.7.105 passed verification. Now
we need to reset version number back to 1.7.0 in the
release branch for the official release.

Incrementing version number to 1.6.0 (onnx#2353)

* Incrementing version number to 1.6.0

* Updating ML version to 2

Bump up version number and update Versioning for 1.5.0 release

Bump up version for a patch release (onnx#1766)

* Bump up version number for v1.4.0 (onnx#1761) (onnx#1763)

* Bump up version to 1.4.1

Bump up version number for v1.4.0 (onnx#1761)

Bump up version for 1.2.3; Avoid copying non-existing files (onnx#1394)

minor fix to scan documentation (onnx#1355)

Add missing warning ignoring flags to onnx_proto CMake target (onnx#1105

)

update version (onnx#1034)

Cherry pick onnx#799 (onnx#828)

* Cherry picked fix on python Schema API

* Merge Rel 1.1.0 branch into master (onnx#657)

* Increase Version number for release 1.1.0

* Increase version number to 1.1.1

(cherry picked from commit ecac1c1)

* Fix some checks not ideal to onnx-ml (onnx#781)

* Fix some checks not ideal to onnx-ml

1. Need to consider cases where no default ONNX operator set exists
2. Cannot assume that value_info's are all tensors (CoreML's neural
network classifiers contain ZipMap, the they may produce Maps)

* Address comments and improve some more error messages

* Make SSA not abbreviated

* Address a comment

* a fix

(cherry picked from commit e3da0f9)

* Cherry picked updated testcases

* Cherry pick updates on testcases (1)

* Remove incorrect cases (onnx#791)

* Update the remainig cases (onnx#794)

* Fix incorrect conflict merge

* Remove unpassed testcases

* Bump up version number

* Kezhan/update ml op spec (onnx#799)

* update normalizer.

* update ml op spec.

* update traditional ops.

* update ml op doc

(cherry picked from commit bf00ae6)