NPM 运行任意指令 SocksProxyAgent 报错

在 NPM 运行任意指令时，均会报以下错误：

/usr/local/lib/node_modules/npm/node_modules/socks-proxy-agent/dist/index.js:110
class SocksProxyAgent extends agent_base_1.Agent {
                                           ^

TypeError: Class extends value undefined is not a constructor or null
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/socks-proxy-agent/dist/index.js:110:44)
    at Module._compile (node:internal/modules/cjs/loader:1165:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1219:10)
    at Module.load (node:internal/modules/cjs/loader:1043:32)
    at Function.Module._load (node:internal/modules/cjs/loader:878:12)
    at Module.require (node:internal/modules/cjs/loader:1067:19)
    at require (node:internal/modules/cjs/helpers:103:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/make-fetch-happen/lib/agent.js:174:29)
    at Module._compile (node:internal/modules/cjs/loader:1165:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1219:10)
    at Module.load (node:internal/modules/cjs/loader:1043:32)
    at Function.Module._load (node:internal/modules/cjs/loader:878:12)
    at Module.require (node:internal/modules/cjs/loader:1067:19)
    at require (node:internal/modules/cjs/helpers:103:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/make-fetch-happen/lib/remote.js:7:18)
    at Module._compile (node:internal/modules/cjs/loader:1165:14)

出现该情况大概率是在切换 node 版本时，npm 版本过低导致的。

我是使用的 n 模块来切换版本的。

解决方案：

1. 先切换回旧的 node 版本；
2. 更新 npm：

$ npm i -g npm

3. 再尝试切换回新的 node 版本；
4. 重新运行相关 npm 命令即可；