cli: switch to axios

cli/index.js

@@ -1,4 +1,15 @@
 #!/usr/bin/env node
+
+const axios = require('axios').default;
+
+const axios_instance = function(argv){
+    argv.axios = axios.create({
+        baseURL: argv['piston-url']
+    });
+
+    return argv;
+};
+
 require('yargs')(process.argv.slice(2))
     .option('piston-url', {
         alias: ['u'],
@@ -6,9 +17,10 @@ require('yargs')(process.argv.slice(2))
         desc: 'Piston API URL',
         string: true
     })
+    .middleware(axios_instance)
     .scriptName("piston")
     .commandDir('commands')
     .demandCommand()
     .help()
     .wrap(72)
-    .argv
+    .argv;