Bump to v4.7.0.

math.default.js

@@ -1,18 +1,21 @@
 import add from './add';
 import ceil from './ceil';
+import divide from './divide';
 import floor from './floor';
 import max from './max';
 import maxBy from './maxBy';
 import mean from './mean';
+import meanBy from './meanBy';
 import min from './min';
 import minBy from './minBy';
+import multiply from './multiply';
 import round from './round';
 import subtract from './subtract';
 import sum from './sum';
 import sumBy from './sumBy';
 
 export default {
-  add, ceil, floor, max, maxBy,
-  mean, min, minBy, round, subtract,
-  sum, sumBy
+  add, ceil, divide, floor, max,
+  maxBy, mean, meanBy, min, minBy,
+  multiply, round, subtract, sum, sumBy
 };