Update Git ignore and attribute pattern

Updated the `.gitattributes` (1) and `.gitignore` (2) configuration
files to use the latest pattern.

References:
  (1) https://git-scm.com/docs/gitattributes
  (2) https://git-scm.com/docs/gitignore

Epic: GH-8
Resolves GH-9

.gitattributes

@@ -1,8 +1,19 @@
-# Automatically perform line feed (LF) normalization for files detected as text and leave all files detected as binary
-# untouched.
-* text=auto
+# Copyright (C) 2018-present Arctic Ice Studio <[email protected]>
+# Copyright (C) 2018-present Sven Greb <[email protected]>
+#
+# Project:    Styleguide JavaScript
+# Repository: https://github.com/arcticicestudio/styleguide-javascript
+# License:    MIT
+# References:
+#   https://git-scm.com/docs/gitattributes
+#   https://git-scm.com/book/en/v2/Customizing-Git-Git-Attributes#Keyword-Expansion
+
+# Automatically perform line feed (LF) normalization for files detected as text and
+# leave all files detected as binary untouched.
+* text=auto eol=lf
 
 # +--------+
 # + Assets +
 # +--------+
+*.ai binary
 *.png binary

.gitignore

@@ -1,9 +1,19 @@
+# Copyright (C) 2018-present Arctic Ice Studio <[email protected]>
+# Copyright (C) 2018-present Sven Greb <[email protected]>
+#
+# Project:    Styleguide JavaScript
+# Repository: https://github.com/arcticicestudio/styleguide-javascript
+# License:    MIT
+
+# +------+
+# + Logs +
+# +------+
+**/*.log
+
 # +---------+
 # + Node.js +
 # +---------+
-node_modules/
-npm-debug.log*
-.npm/
+**/node_modules/
 
 # +-------------------+
 # + Project Structure +