see if this interferes with what execa assigns to the env option

[todo]

spawnteract/index.js

Lines 145 to 150 in 9f595a2

	* package `kernelspecs`
	* @param {object} config connection config
	* @param {string} connectionFile path to the config file
	* @param {object} [spawnOptions] `child_process`-like options for [execa]{@link https://github.com/sindresorhus/execa#options}
	* use `{ cleanupConnectionFile: false }` to disable automatic connection file cleanup
	* @return {object} spawnResults

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This issue was generated by todo based on a TODO comment in 9f595a2 when #33 was merged. cc @BenRussert.