Move python file in src folder (#77)

Preparation of migration to cookiecutter-hypermodern-python template

.travis.yml

@@ -16,7 +16,7 @@ install:
   - python setup.py install
   - python setup.py sdist
 before_script:
-  - pylint synology_dsm tests
+  - pylint src tests
   - black --check --fast .
 script:
   - py.test

setup.py

@@ -25,7 +25,8 @@ setup(
     description="Python API for communication with Synology DSM",
     long_description=long_description,
     author="Quentin POLLET (Quentame) & FG van Zeelst (ProtoThis)",
-    packages=find_packages(include=["synology_dsm*"]),
+    packages=find_packages("src"),
+    package_dir={"": "src"},
     install_requires=required,
     python_requires=">=3.6",
     license="MIT",