merging v0.8.0 branch

- finally using libxml2 parser in beautifulsoup/lxml
- minor bug in parsing the CCC field (qrz.com)
- fixed VK9XX fixture (lat/long)
- added support for python 3.10 and 3.11, pypy3.7-3.9
- removed support for python 3.4
- fixed escapings in regular expressions
- replaced exefile from past.buildins with custom function

test/execfile.py

@@ -0,0 +1,17 @@
+# In Python3 the function 'execfile' has been deprecated. The alternative is 'exec'.
+# While the package 'past.builtins' provide a python2 / python3 compatible version of 'execfile', 
+# the import of 'past.builtins' keeps on throwing a deprecation warning about 'imp'.
+# Therefore the version of 'execfile' from 'past/builtins' has been replaced by this alternative
+# version, found on: https://stackoverflow.com/a/41658338/2292376
+
+# When support of Python2 is finally dropped, this function can be removed
+
+def execfile(filepath, globals=None, locals=None):
+    if globals is None:
+        globals = {}
+    globals.update({
+        "__file__": filepath,
+        "__name__": "__main__",
+    })
+    with open(filepath, 'rb') as file:
+        exec(compile(file.read(), filepath, 'exec'), globals, locals)