Change build number configuration

build/appveyor-project-version-patch.js

@@ -7,7 +7,7 @@ var buildVersion = process.env.APPVEYOR_BUILD_VERSION.substring(1);
 var findPoint = buildVersion.lastIndexOf(".");
 var basePackageVer = buildVersion.substring(0, findPoint);
 var buildNumber = buildVersion.substring(findPoint + 1, buildVersion.length);
-var semversion = semver.valid(basePackageVer + "-alpha" + buildNumber);
+var semversion = semver.valid(basePackageVer + "-alpha" + buildNumber.length === 2 ? buildNumber : "0" + buildNumber);
 
 jsonfile.readFile(file, function (err, project) {
     project.version = semversion;