update all the version bits to 0.2.0

Makefile

@@ -161,7 +161,7 @@ install-go:
 # Docker build and publish variables and targets
 REGISTRY_NAME?=docker.io/hashicorp
 IMAGE_NAME=boundary
-VERSION?=0.1.8
+VERSION?=0.2.0
 IMAGE_TAG=$(REGISTRY_NAME)/$(IMAGE_NAME):$(VERSION)
 IMAGE_TAG_DEV=$(REGISTRY_NAME)/$(IMAGE_NAME):latest-$(shell git rev-parse --short HEAD)
 DOCKER_DIR=./docker