463fbd16f1 Update to arbitrary v1.4 (Tobin C. Harding)
Pull request description:
Out with the old in with the new, update to the latest minor version of arbitrary.
No real reason to do this except that I wanted to add the minor version instead of using just `1` so that we don't accidentally pull a new minor version in during a patch release (after we 1.0).
(I'm unsure if this is necessary and did not test it against MSRV.)
ACKs for top commit:
apoelstra:
ACK 463fbd16f1431febe7e4fc50abd7415886542109; successfully ran local tests
Tree-SHA512: 88913f993b97abba224ba94ee9d5057894bb7142fef07e557de03a423da314a9f21632932fb64c4c27c676051bbb6e90d9b90bfa944af810e834bf42707d3cff