Fix bug in electron app: semver comparison

main.js

@@ -50,6 +50,24 @@ function createWindow () {
     lookForUpdates();
 };
 
+/**
+ * Compares semver strings
+ * @see https://github.com/substack/semver-compare
+ */
+function semverCompare(a, b) {
+    var pa = a.split('.');
+    var pb = b.split('.');
+    for (var i = 0; i < 3; i++) {
+        var na = Number(pa[i]);
+        var nb = Number(pb[i]);
+        if (na > nb) return 1;
+        if (nb > na) return -1;
+        if (!isNaN(na) && isNaN(nb)) return 1;
+        if (isNaN(na) && !isNaN(nb)) return -1;
+    }
+    return 0;
+}
+
 /**
  * Calls the Cassiopee update server to check for available updates;
  * if so, displays a desktop notification which, if clicked, will
@@ -97,7 +115,7 @@ const lookForUpdates = function() {
             response.on('data', (chunk) => {
                 const data = JSON.parse(chunk);
                 // compare current version to latest version
-                if (data.latest && data.latest > version) {
+                if (data.latest && semverCompare(data.latest, version) == 1) {
                     // get download link for latest version, depending on platform
                     if (data[data.latest] && data[data.latest][platform]) {
                         const latestVersionURL = URL + data[data.latest][platform];