Use commander instead of optimist for CLI arguments

package.json

@@ -38,9 +38,9 @@
   "dependencies": {
     "babel-code-frame": "^6.22.0",
     "colors": "^1.1.2",
+    "commander": "^2.9.0",
     "diff": "^3.2.0",
     "glob": "^7.1.1",
-    "optimist": "~0.6.0",
     "resolve": "^1.3.2",
     "semver": "^5.3.0",
     "tslib": "^1.7.1",
@@ -53,12 +53,12 @@
     "@types/babel-code-frame": "^6.20.0",
     "@types/chai": "^3.5.0",
     "@types/colors": "^1.1.3",
+    "@types/commander": "^2.9.0",
     "@types/diff": "^3.2.0",
     "@types/glob": "^5.0.30",
     "@types/js-yaml": "^3.5.29",
     "@types/mocha": "^2.2.35",
     "@types/node": "^7.0.16",
-    "@types/optimist": "^0.0.29",
     "@types/resolve": "^0.0.4",
     "@types/semver": "^5.3.30",
     "chai": "^3.5.0",

src/runner.ts

@@ -103,11 +103,6 @@ export interface IRunnerOptions {
      * Whether to enable type checking when linting a project.
      */
     typeCheck?: boolean;
-
-    /**
-     * Whether to show the current TSLint version.
-     */
-    version?: boolean;
 }
 
 export class Runner {
@@ -118,11 +113,6 @@ export class Runner {
     constructor(private options: IRunnerOptions, private outputStream: NodeJS.WritableStream) { }
 
     public run(onComplete: (status: number) => void) {
-        if (this.options.version) {
-            this.outputStream.write(Linter.VERSION + "\n");
-            return onComplete(0);
-        }
-
         if (this.options.init) {
             if (fs.existsSync(CONFIG_FILENAME)) {
                 console.error(`Cannot generate ${CONFIG_FILENAME}: file already exists`);