chore: add jimp dependency, icon padding script, and update configuration

node_modules/load-bmfont/lib/is-binary.js

@@ -0,0 +1,8 @@
+var equal = require('buffer-equal')
+var HEADER = Buffer.from([66, 77, 70, 3])
+
+module.exports = function(buf) {
+  if (typeof buf === 'string')
+    return buf.substring(0, 3) === 'BMF'
+  return buf.length > 4 && equal(buf.slice(0, 4), HEADER)
+}