Bump to v4.0.0.

seq.js

@@ -0,0 +1,16 @@
+export { default as at } from './wrapperAt';
+export { default as chain } from './chain';
+export { default as commit } from './commit';
+export { default as flatMap } from './wrapperFlatMap';
+export { default as lodash } from './wrapperLodash';
+export { default as next } from './next';
+export { default as plant } from './plant';
+export { default as reverse } from './wrapperReverse';
+export { default as tap } from './tap';
+export { default as thru } from './thru';
+export { default as toIterator } from './toIterator';
+export { default as toJSON } from './toJSON';
+export { default as value } from './wrapperValue';
+export { default as valueOf } from './valueOf';
+export { default as wrapperChain } from './wrapperChain';
+export { default as default } from './seq.default';