Add dependencies as workspace dependencies (#21)

* Add dependencies as workspace dependencies

* Update egui to later version (not latest as that's a breaking change)

* Add .editorconfig

.editorconfig

@@ -0,0 +1,28 @@
+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+# taken from https://github.com/rust-lang/rust/blob/master/.editorconfig
+
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+
+[*.rs]
+max_line_length = 121
+
+[*.md]
+# double whitespace at end of line
+# denotes a line break in Markdown
+trim_trailing_whitespace = false
+
+[*.yml]
+indent_size = 2
+
+[Makefile]
+indent_style = tab