Method insert

github-actions/saucelabs/set-saucelabs-env.js:1121–1127

* @param {string} key * @param {any} value *

(key, value)

         * @param {any} value
         * */
        insert(key, value) {
          if (this.node === null) {
            this.node = new TstNode(key, value, 0);
          } else {
            this.node.add(key, value);
          }
        }
        /**
         * @param {Uint8Array} key
         * @return {any}