Remove tslint and add eslint and prettier

Author: Simplify

.eslintrc.js

@@ -0,0 +1,9 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: 'module',
+  },
+  extends: ['plugin:@typescript-eslint/recommended', 'prettier/@typescript-eslint'],
+  rules: {},
+};

.prettierrc

@@ -0,0 +1,6 @@
+module.exports = {
+  semi: true,
+  trailingComma: "all",
+  singleQuote: true,
+  printWidth: 120
+};

.prettierrc.js

@@ -6,8 +6,8 @@ This project adheres to the Contributor Covenant [code of conduct](.github/CODE_
 By participating, you are expected to uphold this code.
 
 * Clone this repo and run `npm install`.
-* Write tests for your changes in `test/IBANToolsTest.ts`.
+* Write tests for your changes in `test/ibantools_test.js`.
 * Do not write more tests in `karma/ibantoolsSpec.js` unless module have problem with loading using AMD.
-* Before making pull requests run `gulp all && gulp test && gulp karma`.
+* Before making pull requests run `gulp all && gulp test && gulp karma && gulp lint`.
 * Make sure that test coverage stays at 100%.
 * Try not to make pull requests with changes in `dist`, `jsnext` or `build` directories.

CONTRIBUTING.md

@@ -19,6 +19,9 @@ gulp.task("karma", function(done) {
   ).start();
 });
 
+// lint files
+gulp.task("lint", shell.task(["eslint 'src/**/*.ts' 'test/**/*.js'"]));
+
 // generate coverage report
 gulp.task(
   "nyc",