code: function fetchPeerDependencies(packageName) {
      const npmProcess = spawn.sync(
          "npm",
          ["show", "--json", packageName, "peerDependencies"],
          { encoding: "utf8" }
      );
  
      const error = npmProcess.error;
  
      if (error && error.code === "ENOENT") {
          return null;
      }
      const fetchedText = npmProcess.stdout.trim();
  
      return JSON.parse(fetchedText || "{}");
  
  
  }
docs: Fetch `peerDependencies` of the given package by `npm show` command.
  @param {string} packageName The package name to fetch peerDependencies.
  @returns {Object} Gotten peerDependencies. Returns null if npm was not found.