Zappa

* Updated manylinux to support manylinux1/manylinux2010/manylinux2014 packages
* Fixed issue with duplicated cookie headers in API Gateway
* Various maintenance updates to the README file
* Remove old python 2.7 code (not all yet)
* Use pip-tools to manage dependencies (and remove pinned dependencies from the package)
* Add option for concurrency limit
* Use safe_load with YAML
* Support for ABI3 binary packages (particularly cryptography)
* Remove dependency on lambda-packages

* Added support for Python 3.8
* Fixed boto3 reporting of long names
* Added support for new AWS Regions
* Minor bug and README fixes

* Last version with Python 2.7 support.
* Fix for invalid values of HTTP_HOST and others (introduced in 0.48.0)

* Fix for an issue where you couldn't update a function if it had been deployed with a version prior to 0.48.0
* Support for private (VPC-only) API Gateway endpoints

* Deprecation of zappa.async because async is a reserved word in 3.7, please use zappa.asynchronous
* Support for Application Load Balancer as an alternative to API Gateway
* Improvements in manylinux wheel downloads
* Support for multi-value query strings
* Python 3.7 support
* Support for multi-value headers
* Support for the new 256kB async limit
* Bunch of small typos, fixes and documentation improvements
* Use Django 2 on tests with python 3
* Stop applying tags on buckets not created by zappa
* Be more forgiving on 504 errors during deployment
* Fix cleanup of DynamoDB table for async tasks
* Detection of invalid bucket names
* Flake8 checks added to tests

* Handle accounts with more than 100 domains in route 53
* Force requests upgrade to 2.20.0 for compatibility with urllib3 1.24
* Allow defining API Gateway policies (including restricting access to one IP address)