Release v1.5.1 (GoogleCloudPlatform#127)

Release v1.5.0 (GoogleCloudPlatform#122)

Release v1.4.0

Release v1.3.2 (GoogleCloudPlatform#94)

Release v1.3.1 (GoogleCloudPlatform#91)

Release v1.3.0 (GoogleCloudPlatform#88)

Update package-lock files for converter.

* Add support for installing dependencies through yarn.

* Adds CLI help flag.

* Improves docs.
* Updates dependencies.

Creating a new RElease v1.1.1