Change version 1.7.3 -> 1.7.4

Author: wannaphong

setup.py

@@ -12,7 +12,7 @@
 
 setup(
     name="pythainlp",
-    version="1.7.3",
+    version="1.7.4",
     description="Thai Natural Language Processing in Python.",
     long_description=readme,
     long_description_content_type="text/markdown",