Dist fixes (#45)

* Remove no longer applicable py_modules from setup

* Fix .error.html inclusion in package data

* Don't install tests

setup.py

@@ -21,16 +21,11 @@
     author="nielstron",
     author_email="n.muendler@web.de",
     url="https://github.com/nielstron/pysyncthru/",
-    py_modules=["pysyncthru"],
-    packages=find_packages(),
+    packages=find_packages(exclude=("pysyncthru.tests", "pysyncthru.tests.*")),
     package_data={
         "pysyncthru": [
             "py.typed",
         ],
-        "pysyncthru.tests.test_structure": [
-            "sws/app/information/home/home.json",
-            "*.html",
-        ],
     },
     install_requires=[
         "demjson",