Add 0.4 changes to NEWS.md

[dpsanders]

No description provided.

[codecov-io]

Current coverage is 92.75%

Merging #122 into master will increase coverage by +0.23%

@@             master       #122   diff @@
==========================================
  Files            19         19          
  Lines           893        897     +4   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits            826        832     +6   
+ Misses           67         65     -2   
  Partials          0          0          

1. 3 files (not in diff) in src/intervals were modified. more
   • Misses -2
   • Hits +3
2. 1 files (not in diff) in src were modified. more
   • Hits +3

Powered by Codecov. Last updated by e53f067...b04bff4

[coveralls]

Coverage increased (+0.3%) to 92.754% when pulling b04bff4 on v0.4 into e53f067 on master.