Merge pull request #184 from NavaraBV/master

fix: via link resolving for npm 7

Author: quinnturner

lib/Model.js

@@ -77,7 +77,9 @@ class Model {
         let { via } = vulnerability;
 
         if (typeof via[0] === "string") {
-          via = parsedOutput.vulnerabilities[via[0]].via;
+          do {
+            via = parsedOutput.vulnerabilities[via[index] || via[0]].via;
+          } while (typeof via[0] === "string");
           (via[index] || via[0]).paths = `${vulnerability.name}>${
             (via[index] || via[0]).name
           }`;