Refactor code-style to use xo

* Remove superfluous files;
* Remove unneeded Node targets from Travis;
* Update dev-dependencies.

Author: wooorm

.editorconfig

@@ -2,14 +2,8 @@ root = true
 
 [*]
 indent_style = space
-indent_size = 4
+indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
-
-[*.{json,remarkrc,eslintrc,sh}]
-indent_size = 2
-
-[*.md]
-trim_trailing_whitespace = false

.eslintignore

@@ -1,5 +1,6 @@
 .DS_Store
 *.log
+.nyc_output/
 coverage/
 node_modules/
 hastscript.js

.eslintrc

@@ -1,12 +1,8 @@
 language: node_js
 node_js:
 - '0.11'
-- '0.12'
-- '4.0'
-- '5.0'
 - '6.0'
-sudo: false
-after_script: npm install codecov.io && cat ./coverage/lcov.info | codecov
+after_success: bash <(curl -s https://codecov.io/bash)
 deploy:
   - provider: npm
     email: tituswormer@gmail.com