Update terraform to latest (0.13.4)

In order to take advantage of hashicorp/terraform#26192, update to the latest terraform version.

Author: alanraison

install/installer/leeway.Dockerfile

@@ -35,7 +35,7 @@ ENV GITPOD_INSTALLER_IN_DOCKER="true"
 ENV KUBECONFIG="/workspace/kubectl"
 RUN apk add --no-cache aws-cli python3 curl git bash ncurses
 
-RUN curl -o terraform.zip -L https://releases.hashicorp.com/terraform/0.13.0/terraform_0.13.0_linux_amd64.zip && \
+RUN curl -o terraform.zip -L https://releases.hashicorp.com/terraform/0.13.4/terraform_0.13.4_linux_amd64.zip && \
     unzip terraform.zip && \
     rm terraform.zip && \
     mv terraform /usr/bin
@@ -59,4 +59,4 @@ ENV INSTALLER_LAYOUT_FILE=/dist/layout.yaml
 COPY --from=prep /dist ./
 COPY install-installer--app/installer /usr/bin/gp-install
 
-ENTRYPOINT ["/dist/entrypoint.sh"]
+ENTRYPOINT ["/dist/entrypoint.sh"]