Support for newer provider and terraform versions

[coolapso]

update readme
Removed deprecated quotes
Support provider hashicorp/aws >= 4.1
Support terraform >= 0.13.0
Adds optional support for bucket encryption using KMS keys

[coolapso]

Hi, thanks for taking the time and putting this module out. please let me know if there's anything you want clarified or changed.

quite a bit changed specially when it comes to s3 buckets with release the v4.1 of hashicorp/aws provider.
here's the release notes: https://github.com/hashicorp/terraform-provider-aws/releases/tag/v4.1.0

I tried to update the README.md using the ruby scripts by doing:

make docs but all i got was the following:

$make docs 
ruby erb/docs.rb
sed: -e expression #1, char 158: Invalid preceding regular expression
sed: -e expression #1, char 158: Invalid preceding regular expression

therefore, I've updated it manually.

Thank you.

[coolapso]

New feature has been added,
Its now possible configure the recorder and record only some specific resource types.