feat: remove @* logic so we hit the fast path

This @* logic is not helpful here, because snyk-module already
returns '*' for unrecognised versions.

It is incorrect, because we don't append the start for scoped
packages, as we are incorrectly checking for an @. i.e.
@snyk/foo matches, and it shouldn't.

It also stops us hitting the new fast-path in snyk-module.

lib/match.js

@@ -70,12 +70,6 @@ function matchPath(from, path) {
       return true;
     }
 
-    // if we're missing the @version - add @* so the pkg is foobar@*
-    // so we have a good semver range
-    if (pkg.indexOf('@') === -1) {
-      pkg += '@*';
-    }
-
     var target = moduleToObject(pkg);
 
     var pkgVersion = target.version;