Refactor to external scraper and update dependencies (#113)

utils/slug.ts

@@ -0,0 +1,19 @@
+export const extractSlug = (
+    slug: string[]
+): {
+    source?: string,
+    target?: string,
+    query?: string
+} => {
+    const [p1, p2, p3] = slug;
+    switch (slug.length) {
+        case 1:
+            return { query: p1 };
+        case 2:
+            return { target: p1, query: p2 };
+        case 3:
+            return { source: p1, target: p2, query: p3 };
+        default:
+            return {};
+    }
+};