Add taskfile.dev

Refs pkgxdev/pkgx#1066

Author: mxcl

src/sniff.ts

@@ -113,6 +113,9 @@ export default async function (dir: Path) {
         case "Justfile":
           pkgs.push({ project: "just.systems", constraint });
           break;
+        case "Taskfile.yml":
+          pkgs.push({ project: "taskfile.dev", constraint });
+          break;
       }
     } else if (isDirectory) {
       switch (name) {