Migrate project to typescript

.eslintignore

@@ -1,7 +1,30 @@
-dist/
-node_modules/
 tmp/
+config/
+test/
 test/scripts/worker.js
 test/e2e.test.js
 src/index.es5.js
-src/browserify.index.js
+src/browserify.index.js
+
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# testing
+/coverage
+
+#production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+dist/

.eslintrc.js

@@ -0,0 +1,13 @@
+require("@rushstack/eslint-patch/modern-module-resolution");
+
+module.exports = {
+    root: true,
+    extends: ["@toruslabs/eslint-config-typescript"],
+    parser: "@typescript-eslint/parser",
+    ignorePatterns: ["*.config.js", ".eslintrc.js"],
+    parserOptions: {
+        sourceType: "module",
+        ecmaVersion: 2022,
+        project: "./tsconfig.json",
+    },
+};

.prettierignore

@@ -0,0 +1,21 @@
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# testing
+/coverage
+
+#production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

.prettierrc.yaml

@@ -0,0 +1,5 @@
+# .prettierrc or .prettierrc.yaml
+printWidth: 150
+singleQuote: false
+semi: true
+trailingComma: es5

config/karma.conf.js

@@ -2,6 +2,7 @@ const configuration = {
     basePath: '',
     frameworks: [
         'mocha',
+        'sinon',
         'browserify',
         'detectBrowsers'
     ],
@@ -38,6 +39,7 @@ const configuration = {
     // Karma plugins loaded
     plugins: [
         'karma-mocha',
+        'karma-sinon',
         'karma-browserify',
         'karma-chrome-launcher',
         'karma-edge-launcher',