chore: add arch property check

Author: bahmutov

src/utils.js

@@ -4,6 +4,7 @@ const la = require('lazy-ass')
 // to install multiple packages, use comma-separated list
 const isNpmInstall = is.schema({
   platform: is.maybe.unemptyString,
+  arch: is.maybe.unemptyString,
   env: is.maybe.object,
   packages: is.unemptyString
 })
@@ -12,7 +13,7 @@ const isNpmInstall = is.schema({
  * Returns given string surrounded by ```json + ``` quotes
  * @param {string} s
  */
-const toJsonCodeBlock = (s) => {
+const toJsonCodeBlock = s => {
   const start = '```json'
   const finish = '```'
 
@@ -23,7 +24,7 @@ const toJsonCodeBlock = (s) => {
  * Converts given JSON object into markdown text block
  * @param {object} object
  */
-const toMarkdownJsonBlock = (object) => {
+const toMarkdownJsonBlock = object => {
   la(object, 'expected an object to convert to JSON', object)
   const str = JSON.stringify(object, null, 2)