v1.3.2

Tracking TooManyCooks bugfix backports release 1.3.2.

Backports branches v1.0, v1.1, v1.2, and v1.3 have been created.

On these branches, the new latest tags are v1.0.1, v1.1.1, v1.2.1, and v1.3.2.

3 minor fixes were made. All fixes were been backported to the above branches and tags.

• fix resume_on() awaitable customizer doc comment
• result_type should use decay_t like result storage
• document that teardown() and destructor must be called from external thread