fix: compare stringified objects

fixes issue with packages that have no dependencies or devDependencies

src/data.js

@@ -18,7 +18,7 @@ exports.read = (fileRoot, ident) => {
 
   try {
     const data = JSON.parse(fs.readFileSync(filePath));
-    return data[ident] || {};
+    return JSON.stringify(data[ident] || {});
   } catch (err) {
     if (err.code === 'ENOENT') {
       fs.writeFileSync(filePath, JSON.stringify({}));

src/index.js

@@ -1,6 +1,5 @@
 const path = require('path');
 const md5File = require('md5-file');
-const deepEqual = require('fast-deep-equal');
 const shellExec = require('shell-exec');
 const data = require('./data');
 const utils = require('./utils');
@@ -50,7 +49,7 @@ module.exports = async function pkgcomp(config, ident, opts = defaultOptions) {
   };
 
   // check if the command should be run
-  const runCmd = Boolean(opts.force || (doExec && !deepEqual(packageHistory, payload)));
+  const runCmd = Boolean(opts.force || (doExec && packageHistory !== JSON.stringify(payload)));
 
   if (runCmd) {
     const res = await execCommand(config.cmd);