Remove bindings dependency (require the built addon directly because the build output location is well-known and constant)

Add note about a possible error and its solution to the README
Improve .editorconfig
Run tests in CI workflow

lib/pcsclite.js

@@ -1,7 +1,13 @@
 "use strict";
 
 const EventEmitter = require('events');
-const pcsclite = require('bindings')('pcsclite');
+
+// pcsclite.node is a Node.js native C++ addon that is compiled during installation
+// via node-gyp (see package.json > scripts > install)
+// the build output name and directory is constant so we can require it directly
+// see https://github.com/nodejs/node-gyp/issues/263, https://github.com/nodejs/node-gyp/issues/631
+const pcsclite = require('../build/Release/pcsclite.node');
+
 const { PCSCLite, CardReader } = pcsclite;