Make planetiler-openmaptiles runnable as a standalone project (#19)

scripts/regenerate-openmaptiles.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+set -o nounset
+
+TAG="${1:-"v3.13.1"}"
+echo "tag=${TAG}"
+
+BASE_URL="${2:-"https://raw.githubusercontent.com/openmaptiles/openmaptiles/"}"
+echo "base-url=${BASE_URL}"
+
+echo "Building..."
+./mvnw -DskipTests=true package
+
+echo "Running..."
+java -cp target/*-with-deps.jar org.openmaptiles.Generate -tag="${TAG}" -base-url="${BASE_URL}"
+
+echo "Formatting..."
+./scripts/format.sh