v0.15.0

Add `capacity_type` to support node group spot pricing @ChrisMcKee (#45)

what

• Adds in support for capacity_type settings on node group
• Removes clrf from document https://www.atechtown.com/remove-ctrl-m-character/
• Adds gitattributes so linux line endings are maintained

why

• Who doesn't like spot pricing
• I don't like paying full price for machines

references

• https://aws.amazon.com/blogs/containers/amazon-eks-now-supports-provisioning-and-managing-ec2-spot-instances-in-managed-node-groups/
• https://aws.amazon.com/about-aws/whats-new/2020/12/amazon-eks-support-ec2-spot-instances-managed-node-groups/
• https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/eks_node_group#capacity_type