Treat suffixed version numbers ass pre release and less than unsuffixed version numbers

Author: socsieng

src/util/version.spec.ts

@@ -41,7 +41,8 @@ describe('Compare', () => {
     ['v1.0', '1', 0],
     ['v1.0', '1.0', 0],
     ['1.01-beta', '1.1-beta', 0],
-    ['1.1', '1.1-beta', -1],
+    ['1.1', '1.1-beta', 1],
+    ['1.1-pre-release', '1.1', -1],
     ['1.10', '1.10.3', -1],
     ['1.2', '1.10', -1],
     ['1.5', '1.2', 1],

src/util/version.ts

@@ -47,6 +47,10 @@ export default class Version {
       return 1;
     } else if ((a.build || 0) < (b.build || 0)) {
       return -1;
+    } else if (!a.suffix && b.suffix) {
+      return 1;
+    } else if (a.suffix && !b.suffix) {
+      return -1;
     } else if ((a.suffix || '') > (b.suffix || '')) {
       return 1;
     } else if ((a.suffix || '') < (b.suffix || '')) {