New functionality and features

------------------------------
  * Add guzzle 7 support
  * Add doc strings for classes

Other Changes
-------------
  * Remove support for instagram profile picture
  * Fix bug in `ApiUtils::serializeArrayOfArrays`
  * Fix headers serialisation in Upload API

Version 1.18.0

New functionality and features

------------------------------
  * Add Structured Metadata
  * Add Account Provisioning API
  * Add support for `eval` upload parameter
  * Add parameters to `Vectorize` effect constructor
  * Make `signParameters` function public
  * Make `ApiUtils` class public

Other Changes
-------------

  * Fix incoming transformation serialization in upload API
  * PHP doc strings for transformation arguments, codecs, expressions and variables
  * Add class doc strings
  * Fix `testLayerParamFactory` unit test
  * Expose `GradientFade` in documentation
  * Fix `AuthToken` doc strings
  * Fix namespaces, folders, and more in tests
  * Remove spare newline

 * Fix `videoTag` transformations support

 * Fix `videoTag` builder

  * Integrate with sub-account test service

Version 2.0.0-beta

Co-authored-by: Asi Sayag <asi@cloudinary.com>
Co-authored-by: Caroline Levison <caroline.levison@cloudinary.com>
Co-authored-by: Jackie Rosenzveig <jackie@cloudinary.com>
Co-authored-by: Meir Feinberg <meir.feinberg@cloudinary.com>
Co-authored-by: RTLCoil <oleg@rtl.co.il>
Co-authored-by: Raz Ziv <raz.ziv@cloudinary.com>
Co-authored-by: Nir Maoz <nir.maoz@cloudinary.com>

Integrate with sub-account test service

* Integrate with sub-account test service

* Add version to test cloud

New functionality and features

------------------------------
  * Add structured metadata administration to Admin API
  * Add support for 32 char SHA-256 URL signatures
  * Add SHA-256 signature support
  * Add `accessibility_analysis` parameter support
  * Add support of PHP 7.4
Other Changes
-------------
  * Remove redundant dependencies check in `update_version` script
  * Fix `update_version` script linux compatibility
  * Add `update-only` flag to `update_version` script
  * Fix legacy autoloader on Linux
  * Update issue templates

 * The second public beta of Cloudinary PHP v2