feat: full upgrade to python3, tests, etc.

.editorconfig

@@ -3,17 +3,17 @@
 # top-most EditorConfig file
 root = true
 
-# Unix-style newlines with a newline ending every file
 [*]
-end_of_line = lf
-insert_final_newline = true
-
-# Matches multiple files with brace expansion notation
-# Set default charset
-[*.{js,py}]
 charset = utf-8
-
-# 4 space indentation
-[*.py]
-indent_style = tab
+end_of_line = lf
+max_line_length = 100
+insert_final_newline = true
+indent_style = space
 indent_size = 2
+trim_trailing_whitespace = true
+
+[*.py]
+indent_size = 4
+
+[Makefile]
+indent_style = tab