Support aws provider 4+ (#119)

* Support aws provider 4+

* Auto Format

Co-authored-by: cloudpossebot <11232728+cloudpossebot@users.noreply.github.com>

Author: max-lobur

README.md

@@ -300,7 +300,7 @@ Available targets:
 | <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_permissions_boundary_arn"></a> [permissions\_boundary\_arn](#input\_permissions\_boundary\_arn) | Policy ARN to attach to instance role as a permissions boundary | `string` | `""` | no |
-| <a name="input_private_ip"></a> [private\_ip](#input\_private\_ip) | Private IP address to associate with the instance in the VPC | `string` | `""` | no |
+| <a name="input_private_ip"></a> [private\_ip](#input\_private\_ip) | Private IP address to associate with the instance in the VPC | `string` | `null` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_region"></a> [region](#input\_region) | AWS Region the instance is launched in | `string` | `""` | no |
 | <a name="input_root_block_device_encrypted"></a> [root\_block\_device\_encrypted](#input\_root\_block\_device\_encrypted) | Whether to encrypt the root block device | `bool` | `true` | no |
@@ -450,7 +450,7 @@ In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
 
 ## Copyright
 
-Copyright © 2017-2021 [Cloud Posse, LLC](https://cpco.io/copyright)
+Copyright © 2017-2022 [Cloud Posse, LLC](https://cpco.io/copyright)
 
 
 

docs/terraform.md

@@ -103,7 +103,7 @@
 | <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
 | <a name="input_permissions_boundary_arn"></a> [permissions\_boundary\_arn](#input\_permissions\_boundary\_arn) | Policy ARN to attach to instance role as a permissions boundary | `string` | `""` | no |
-| <a name="input_private_ip"></a> [private\_ip](#input\_private\_ip) | Private IP address to associate with the instance in the VPC | `string` | `""` | no |
+| <a name="input_private_ip"></a> [private\_ip](#input\_private\_ip) | Private IP address to associate with the instance in the VPC | `string` | `null` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_region"></a> [region](#input\_region) | AWS Region the instance is launched in | `string` | `""` | no |
 | <a name="input_root_block_device_encrypted"></a> [root\_block\_device\_encrypted](#input\_root\_block\_device\_encrypted) | Whether to encrypt the root block device | `bool` | `true` | no |

variables.tf

@@ -138,7 +138,7 @@ variable "monitoring" {
 variable "private_ip" {
   type        = string
   description = "Private IP address to associate with the instance in the VPC"
-  default     = ""
+  default     = null
 }
 
 variable "source_dest_check" {