fix(node19+): fix compatibility with Node.js >= 19 to request flow specs from URL

Author: danielduarte

package.json

@@ -97,5 +97,8 @@
     "functions": 50,
     "lines": 85,
     "statements": 85
+  },
+  "testen": {
+    "node": ">=13 && <23"
   }
 }

src/engine/flow-manager.ts

@@ -93,7 +93,7 @@ export class FlowManager {
 
     return new Promise<ValueMap>((resolveFlow, reject) => {
       client! // eslint-disable-line @typescript-eslint/no-non-null-assertion
-        .get(flowSpecUrl, (res: IncomingMessage) => {
+        .get(flowSpecUrl, { agent: false }, (res: IncomingMessage) => {
           const { statusCode } = res;
           const contentType = res.headers['content-type'] ?? 'application/json';