[readme]add semicolons to readme code examples

Co-authored-by: Jordan Harband <ljharb@gmail.com>

README.md

@@ -49,7 +49,7 @@ $ node example/parse.js -x 3 -y 4 -n5 -abc --beep=boop --no-ding foo bar baz
 # methods
 
 ``` js
-const parseArgs = require('minimist')
+const parseArgs = require('minimist');
 ```
 
 ## const argv = parseArgs(args, opts={})