build: simplify configs

.babelrc

@@ -1,13 +1,10 @@
 {
   "presets": [
-    [
-      "es2015",
-      {
-        "modules": false
+    ["env", {
+      "modules": false,
+      "targets": {
+        "browsers": ["last 2 versions", "ie >= 9"]
       }
-    ]
-  ],
-  "plugins": [
-    "external-helpers"
+    }]
   ]
 }

.eslintrc

@@ -5,9 +5,6 @@
   },
   "rules": {
     "arrow-body-style": 0,
-    "comma-dangle": 0,
-    "default-case": 0,
-    "no-param-reassign": 0,
-    "no-plusplus": 0
+    "no-param-reassign": 0
   }
 }

.gitattributes

@@ -1,17 +1,2 @@
-# Automatically normalize line endings for all text-based files
-# http://git-scm.com/docs/gitattributes#_end_of_line_conversion
+# Auto detect text files and perform LF normalization
 * text=auto
-
-# For the following file types, normalize line endings to LF on
-# checkin and prevent conversion to CRLF when they are checked out
-# (this is required in order to prevent newline related issues like,
-# for example, after the build script is run)
-.*      text eol=lf
-*.css   text eol=lf
-*.html  text eol=lf
-*.js    text eol=lf
-*.json  text eol=lf
-*.md    text eol=lf
-*.sh    text eol=lf
-*.txt   text eol=lf
-*.xml   text eol=lf

.gitignore

@@ -1,49 +1,3 @@
-# Project
-/_*
-*.map
-bower_components
 node_modules
-
-# Windows image file caches
-Thumbs.db
-ehthumbs.db
-
-# Folder config file
-Desktop.ini
-
-# Recycle Bin used on file shares
-$RECYCLE.BIN/
-
-# Windows Installer files
-*.cab
-*.msi
-*.msm
-*.msp
-
-# Windows shortcuts
-*.lnk
-
-# =========================
-# Operating System Files
-# =========================
-
-# OSX
-# =========================
-
-.DS_Store
-.AppleDouble
-.LSOverride
-
-# Thumbnails
-._*
-
-# Files that might appear on external disk
-.Spotlight-V100
-.Trashes
-
-# Directories potentially created on remote AFP share
-.AppleDB
-.AppleDesktop
-Network Trash Folder
-Temporary Items
-.apdisk
+*.map
+_*

.npmignore

@@ -1,14 +1,13 @@
 /_*
 /.*
 *.map
-bower_components
 build
 docs
 examples
 node_modules
 test
 bower.json
-postcss.config.json
+postcss.config.js
 rollup.config.js
 CONTRIBUTING.md
 ISSUE_TEMPLATE.md