Added EditorConfig rule for Matlab and Racket source files (#177)

* Added EditorConfig rule for Matlab source files

* Added EditorConfig rule for Racket source files

Author: Butt4cak3

.editorconfig

@@ -70,6 +70,11 @@ indent_size = 4
 indent_style = space
 indent_size = 2
 
+# Matlab
+[*.m]
+indent_style = space
+indent_size = 4
+
 # Markdown
 [*.md]
 indent_style = space
@@ -85,6 +90,11 @@ indent_size = 2
 indent_style = space
 indent_size = 4
 
+# Racket
+[*.rkt]
+indent_style = space
+indent_size = 2
+
 # Rust
 [*.rs]
 indent_style = space