Update .editorconfig to include GLSL

.editorconfig

@@ -8,4 +8,9 @@ insert_final_newline = true
 [*.hpp]
 indent_style = space
 indent_size = 4
-insert_final_newline = true
+insert_final_newline = true
+
+[*.glsl]
+indent_style = space
+indent_size = 4
+insert_final_newline = false