doc: Update Doc Version Number

PR-URL: #277
Reviewed-By: Gabriel Schulhof <gabriel.schulhof@intel.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

doc/Doxyfile

@@ -38,7 +38,7 @@ PROJECT_NAME           = N-API
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.3.3
+PROJECT_NUMBER         = 1.3.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a