Fix the dependency preparation

Author: ArtyomVancyan

setup.py

@@ -1,4 +1,4 @@
-import os
+from distutils import dir_util
 from os.path import dirname, join
 from urllib.request import urlretrieve
 
@@ -7,12 +7,6 @@
 if __name__ == "__main__":
     cdn = "https://cdnjs.cloudflare.com/ajax/libs/mermaid/9.4.3/mermaid.js"
     static = join(dirname(__file__), "src", "django_mermaid", "static")
-    print("ls src\n\n")
-    os.system("ls src")
-    print("ls src/django_mermaid\n\n")
-    os.system("ls src/django_mermaid")
-    print("ls src/django_mermaid/static\n\n")
-    os.system("ls src/django_mermaid/static")
-    open(join(static, "mermaid.js"), "w").close()
+    dir_util.create_tree(static, ["mermaid.js"])
     urlretrieve(cdn, join(static, "mermaid.js"))
     setup()

src/django_mermaid/__init__.py

@@ -1 +1 @@
-__version__ = "0.0.1"
+__version__ = "0.0.2"