Bump to 0.2.60 (rustwasm#2051)

* Bump to 0.2.60

* Try to fix CI

* Fix CI syntax

Bump to 0.2.59 (rustwasm#2026)

Wow this is a big release!

Bump to 0.2.58 (rustwasm#1946)

Bump to 0.2.57 (rustwasm#1943)

Version 0.2.56

Bump to 0.2.55 (rustwasm#1864)

Bump to 0.2.54 (rustwasm#1854)

Bump to 0.2.53 (rustwasm#1840)

Bump to 0.2.52 (rustwasm#1833)

Bump to 0.2.51 (rustwasm#1797)

This notably brings in async/await support for current beta/nightly
users. Yay!