Update version in php_version.h as well

cmb69 · cmb69 · commit 125fc0b8d4ea · 2021-05-05T15:18:46.000+02:00
The version there is automatically updated during `./configure`, but
not on Windows.
diff --git a/main/php_version.h b/main/php_version.h
@@ -2,7 +2,7 @@
 /* edit configure.ac to change version number */
 #define PHP_MAJOR_VERSION 7
 #define PHP_MINOR_VERSION 4
-#define PHP_RELEASE_VERSION 19
+#define PHP_RELEASE_VERSION 20
 #define PHP_EXTRA_VERSION "-dev"
-#define PHP_VERSION "7.4.19-dev"
-#define PHP_VERSION_ID 70419
+#define PHP_VERSION "7.4.20-dev"
+#define PHP_VERSION_ID 70420
