Add v3.13.4 to CHANGELOG [ci skip]
Add v3.13.4 to CHANGELOG
[ci skip]

(cherry picked from commit 4d02f86ab30c94c4d4c9b2ae15663214865ff134)

asakusuma/ember.js,elwayman02/ember.js,asakusuma/ember.js,emberjs/ember.js,GavinJoyce/ember.js,knownasilya/ember.js,stefanpenner/ember.js,sandstrom/ember.js,stefanpenner/ember.js,GavinJoyce/ember.js,elwayman02/ember.js,mfeckie/ember.js,asakusuma/ember.js,sandstrom/ember.js,miguelcobain/ember.js,miguelcobain/ember.js,mfeckie/ember.js,emberjs/ember.js,tildeio/ember.js,miguelcobain/ember.js,miguelcobain/ember.js,stefanpenner/ember.js,GavinJoyce/ember.js,mfeckie/ember.js,knownasilya/ember.js,mixonic/ember.js,givanse/ember.js,sly7-7/ember.js,mixonic/ember.js,tildeio/ember.js,mixonic/ember.js,givanse/ember.js,tildeio/ember.js,fpauser/ember.js,elwayman02/ember.js,fpauser/ember.js,sandstrom/ember.js,sly7-7/ember.js,emberjs/ember.js,asakusuma/ember.js,GavinJoyce/ember.js,elwayman02/ember.js,givanse/ember.js,sly7-7/ember.js,fpauser/ember.js,fpauser/ember.js,knownasilya/ember.js,givanse/ember.js,mfeckie/ember.js