Add support for setuptools_scm, fix some import issues

.gitignore

@@ -1,2 +1,5 @@
 __pycache__
 *.py[cd]
+*.egg-info
+build
+dist

playtypus/settingsdialog.py

@@ -1,6 +1,6 @@
 from PyQt5 import QtWidgets
 
-from ui_settingsdialog import UiSettingsDialog
+from playtypus.ui_settingsdialog import UiSettingsDialog
 
 
 class SettingsDialog(QtWidgets.QDialog, UiSettingsDialog):

pyproject.toml

@@ -0,0 +1,6 @@
+[build-system]
+requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+write_to = playtypus/version.py

setup.cfg

@@ -1,6 +1,5 @@
 [metadata]
 name = Playtypus
-version = 0.1.0
 description = A desktop client for Funkwhale
 long_description = file: README.rst
 long_description_content_type = text/x-rst
@@ -8,7 +7,9 @@ long_description_content_type = text/x-rst
 [options]
 packages =
     playtypus
-install_requirements = 
+setup_requires =
+    setuptools_scm
+install_requires = 
     PyQt5
     requests
     funksnake

setup.py

@@ -1,3 +1,3 @@
 from setuptools import setup
 
-setup()
+setup(use_scm_version=True)