Add --version / -V flag to mo-fmt (#136)

* Add '--version' / '-V' flag to mo-fmt

* Update package-lock.json

package.json

@@ -1,6 +1,6 @@
 {
     "name": "prettier-plugin-motoko",
-    "version": "0.9.3",
+    "version": "0.9.4",
     "description": "A code formatter for the Motoko smart contract language.",
     "main": "lib/environments/node.js",
     "browser": "lib/environments/web.js",

packages/mo-fmt/package.json

@@ -1,6 +1,6 @@
 {
     "name": "mo-fmt",
-    "version": "0.9.3",
+    "version": "0.9.4",
     "description": "An easy-to-use Motoko formatter command.",
     "main": "src/cli.js",
     "bin": {
@@ -22,7 +22,7 @@
         "commander": "^9.4.0",
         "fast-glob": "^3.2.11",
         "prettier": "2",
-        "prettier-plugin-motoko": "^0.9.3"
+        "prettier-plugin-motoko": "^0.9.4"
     },
     "devDependencies": {
         "@rollup/plugin-commonjs": "^22.0.2",

packages/mo-fmt/src/cli.js

@@ -8,7 +8,7 @@ const glob = require('fast-glob');
 
 // console.log(prettier.getSupportInfo().options);
 
-const { check, ignore } = program
+const { check, ignore, version } = program
     .argument('[paths...]', 'file paths to format (examples: File.mo, **/*.mo)')
     .option(
         '-c, --check',
@@ -19,9 +19,15 @@ const { check, ignore } = program
         'file paths to ignore, comma-separated',
         '**/node_modules/**/*',
     )
+    .option('-V, --version', 'show installed version')
     .parse()
     .opts();
 
+if (version) {
+    console.log('mo-fmt', require('../package.json').version);
+    process.exit(0);
+}
+
 if (!program.args.length) {
     console.log(program.helpInformation());
     process.exit(0);