fix: strip the UTF8 BOM (#85)

We read the input file as UTF8, and in csv-parse documentation is
written "It is recommended to always activate this option when working
with UTF-8 files."

import.js

@@ -13,6 +13,7 @@ const importFile = (octokit, file, values) => {
       data,
       {
         trim: true,
+        bom: true,
       },
       (err, csvRows) => {
         if (err) throw err;