Merge pull request #457 from steemit/456-smt-op-serialization

README.md

package-lock.json

package.json

src/api/methods.js

src/auth/serializer/src/ChainTypes.js

src/auth/serializer/src/operations.js

src/auth/serializer/src/types.js

src/broadcast/operations.js

test/broadcast.test.js

test/hf20-accounts.test.js

test/hf21-sps.test.js

test/smt.test.js