fix: 兼容5和7的proxy依赖

utils/proxy.js

@@ -0,0 +1,17 @@
+// workaround for ver 7.x and ver 5.x
+import HttpsProxyAgent from 'https-proxy-agent'
+
+let proxy = HttpsProxyAgent
+if (typeof proxy !== 'function') {
+  proxy = (p) => {
+    return new HttpsProxyAgent.HttpsProxyAgent(p)
+  }
+}
+
+/**
+ * return a proxy function
+ * @returns {*|createHttpsProxyAgent|((opts: (string | createHttpsProxyAgent.HttpsProxyAgentOptions)) => HttpsProxyAgent)}
+ */
+export function getProxy () {
+  return proxy
+}