emsdk: add version 3.1.73

[fpelliccioni]

Summary

Changes to recipe: emsdk/3.1.73

Motivation

Details

---

• Read the contributing guidelines
• Checked that this PR is not a duplicate: list of PRs by recipe
• Tested locally with at least one configuration using a recent version of Conan

[igagis]

I'm trying to use emsdk/3.1.72 at the moment and it gives me errors like this:

em++: error: node version appears too old (seeing "v16.3.0", expected "v16.20.0") [-Wversion-check] [-Werror]

as emsdk/3.1.72 still strictly depends on nodejs/16.3.0.

Will this PR update the dependency to nodejs/[>=16.20.0]?

[igagis]

I opened a separate PR #26247 for the nodejs dependency version.