Update ChangeLog

sysctl/ChangeLog

+2018-12-01 -0.4.0
+* After 6 years of development, our senior elves have finally made the
+decision to open source the castle automation project.
+* Request machine learning and artificial intelligence integration support.
+* Automate any and every function possible to get presents delivered faster.
+* Keep security in mind at all times to prevent cloud leaks.
+* Protect all sensitive files with strong a password.
+
 2014-01-20 - 0.3.0
 * Add optional comment inside the sysctl.d file.
 * Use sysctl -p with the created/modified file instead of sysctl -w (#3).