Bump version to v2.5.0+arr1

Signed-off-by: Alex Tsitsimpis <alextsi@arrikto.com>

Merge pull request okta#290 from okta/email_templates_api

Merge pull request okta#277 from okta/develop

Merge develop branch, v2.4.0

Merge pull request okta#262 from okta/bump_version

Merge pull request okta#260 from okta/develop

Merge pull request okta#246 from okta/develop

Merge develop branch, release 2.2.0

Fix unset params

* Re-generate SDK based on openapi spec 2.6.0, expose param `keep_empty_params`.
* Update README, CHANGELOG and version

Merge develop branch. Release v2.0.0

Merge develop branch. Release SDK v2.0.0

Merge develop branch. Release v2.0.0

Merge develop branch. Release SDK v2.0.0

Bump SDK version to 1.7.0