support earlier Playwright versions

Version 1.7.0 is the first one where the version of Node in the Docker
image supports top-level await.

cloudflare-playwright.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
 cd "$(dirname "$(readlink --canonicalize "$0")")"
-docker run --rm --volume "$PWD":/app:ro mcr.microsoft.com/playwright:v$(node --eval='console.log(require("playwright-core/package.json").version)') node /app $1
+docker run --rm --volume "$PWD":/app:ro mcr.microsoft.com/playwright:v$(node --eval='console.log(require("./node_modules/playwright-core/package.json").version)') node /app $1

package.json

@@ -1,6 +1,6 @@
 {
 	"type": "module",
 	"dependencies": {
-		"playwright-core": "^1.16.2"
+		"playwright-core": "^1.7.0"
 	}
 }