Replace Deprecated pkg_resources with importlib (#30)

mutalyzer_hgvs_parser/__init__.py

@@ -1,17 +1,13 @@
-from pkg_resources import get_distribution
+from importlib.metadata import metadata
 
 from .convert import to_model
 from .hgvs_parser import parse
 
 
 def _get_metadata(name):
-    pkg = get_distribution(__package__)
+    meta = metadata(__package__)
 
-    for line in pkg.get_metadata_lines(pkg.PKG_INFO):
-        if line.startswith("{}: ".format(name)):
-            return line.split(": ")[1]
-
-    return ""
+    return meta.get(name, "")
 
 
 _copyright_notice = "Copyright (c) {} <{}>".format(