style: add editorconfig and run shfmt (#95)

Author: giovtorres

.editorconfig

@@ -0,0 +1,22 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+root = true
+
+[*]
+charset = utf-8
+indent_size = 4
+end_of_line = lf
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{md,rst}]
+trim_trailing_whitespace = false
+
+[*.sh,test/run]
+shell_variant = bash
+space_redirects = true    # -sr
+switch_case_indent = true # -ci
+
+[*.bats]
+shell_variant = bats

README.md

@@ -213,7 +213,7 @@ Tests are powered by [Bats](https://github.com/bats-core/bats-core).\
 Run:
 
 ```bash
-./test.sh
+bash tests/run
 ```
 
 ## 🤝 Contributing