Fix javascript JWT regexp check

frontend/src/metabase/lib/utils.js

@@ -65,7 +65,7 @@ var MetabaseUtils = {
     },
 
     isJWT(string) {
-        return typeof string === "string" && /^[A-Za-z0-9]+\.[A-Za-z0-9]+\.[A-Za-z0-9_-]+$/.test(string);
+        return typeof string === "string" && /^[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+$/.test(string);
     },
 
     validEmail: function(email) {

frontend/test/lib/utils.unit.spec.js

@@ -79,6 +79,12 @@ describe('utils', () => {
             expect(MetabaseUtils.isEmpty(" ")).toEqual(true);
         });
     });
+
+    describe("isJWT", () => {
+        it("should allow for JWT tokens with dashes", () => {
+            expect(MetabaseUtils.isJWT("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwYXJhbXMiOnsicGFyYW0xIjoidGVzdCIsInBhcmFtMiI6ImFiIiwicGFyYW0zIjoiMjAwMC0wMC0wMFQwMDowMDowMCswMDowMCIsInBhcmFtNCI6Iu-8iO-8iSJ9LCJyZXNvdXJjZSI6eyJkYXNoYm9hcmQiOjB9fQ.wsNWliHJNwJBv_hx0sPo1EGY0nATdgEa31TM1AYotIA")).toEqual(true);
+        });
+    });
 });
 
 function shuffle(a) {