feat(next)!: change "slug" search param to "path" in preview/revalidate urls

BREAKING CHANGE:
When Drupal uses the Preview Url and the Revalidate Url, the "slug" search param
has been renamed to "path".

Fixes #718

Author: JohnAlbin

pages/api/revalidate.ts

@@ -4,21 +4,21 @@ export default async function handler(
   request: NextApiRequest,
   response: NextApiResponse
 ) {
-  let slug = request.query.slug as string
+  let path = request.query.path as string
   const secret = request.query.secret as string
 
   // Validate secret.
   if (secret !== process.env.DRUPAL_REVALIDATE_SECRET) {
     return response.status(401).json({ message: "Invalid secret." })
   }
 
-  // Validate slug.
-  if (!slug) {
-    return response.status(400).json({ message: "Invalid slug." })
+  // Validate path.
+  if (!path) {
+    return response.status(400).json({ message: "Invalid path." })
   }
 
   try {
-    await response.revalidate(slug)
+    await response.revalidate(path)
 
     return response.json({})
   } catch (error) {