- Added support to download the latest of a major line for Chrome drivers (e.g. 85 or 85.0.4183)

[lmartorella]

Since the Chrome REST API https://www.googleapis.com/storage/v1/b/chromedriver to download chrome drivers seems to support:

• LATEST_RELEASE for the lastest version
• LATEST_RELEASE_vv the the latest version of the vv major version
• LATEST_RELEASE_vv.dd,mm the the latest version of the vv.dd.mm version (then having only the last build number omitted) with this change it is possible to specify a partial version for chrome driver, in order to download the latest driver.

For example: webdrivermanager chrome:85 webdrivermanager chrome:81.0.4044

This is requires since Chrome releases are not often in sync with the driver version til the forth number.

[lmartorella]

This can be closed now, that the library has the support for compatible versions with the installed one.