chore: add .editorconfig (#19)

Author: stasadev

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{bats,sh,yml,yaml}]
+indent_size = 2

.gitattributes

@@ -2,3 +2,4 @@
 tests/ export-ignore
 .github/ export-ignore
 .gitattributes export-ignore
+.editorconfig export-ignore