fix: Updated code and version requirements to work with Terraform 0.15 (#1165)

.gitignore

@@ -1,14 +1,41 @@
-*.tfvars
-*.tfstate*
-.terraform/
-**/inspec.lock
-*.gem
-Gemfile.lock
-terraform.tfstate.d/
 eks-admin-cluster-role-binding.yaml
 eks-admin-service-account.yaml
-.idea/
-*.iml
 config-map-aws-auth*.yaml
 kubeconfig_*
-*.swp
+
+#################################################################
+# Default .gitignore content for all terraform-aws-modules below
+#################################################################
+
+.DS_Store
+
+# Local .terraform directories
+**/.terraform/*
+
+# Terraform lockfile
+.terraform.lock.hcl
+
+# .tfstate files
+*.tfstate
+*.tfstate.*
+*.tfplan
+
+# Crash log files
+crash.log
+
+# Exclude all .tfvars files, which are likely to contain sentitive data, such as
+# password, private keys, and other secrets. These should not be part of version
+# control as they are data points which are potentially sensitive and subject
+# to change depending on the environment.
+*.tfvars
+
+# Ignore override files as they are usually used to override resources locally and so
+# are not checked in
+override.tf
+override.tf.json
+*_override.tf
+*_override.tf.json
+
+# Ignore CLI configuration files
+.terraformrc
+terraform.rc