bumped version to 2.7.4-DEV

CHANGELOG

@@ -1,3 +1,7 @@
+* 2.7.3 (2019-XX-XX)
+
+ * n/a
+
 * 2.7.3 (2019-03-21)
 
  * fixed the spaceless filter so that it behaves like the spaceless tag

src/Environment.php

@@ -38,12 +38,12 @@ use Twig\TokenParser\TokenParserInterface;
  */
 class Environment
 {
-    const VERSION = '2.7.3';
-    const VERSION_ID = 20703;
+    const VERSION = '2.7.4-DEV';
+    const VERSION_ID = 20704;
     const MAJOR_VERSION = 2;
     const MINOR_VERSION = 7;
-    const RELEASE_VERSION = 3;
-    const EXTRA_VERSION = '';
+    const RELEASE_VERSION = 4;
+    const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;