#### Is this adding or improving a _feature_ or fixing a _bug_?
Debt.
#### What's the new behavior?
`createHyperscript` takes an options object that now looks for the `decorations` property instead of the `decorators` property
#### How does this change work?
Pretty straightforward rename of an option, then all of its uses and wherever the term decorators showed up in docs
#### Have you checked that...?
* [x] The new code matches the existing patterns and styles.
* [x] The tests pass with `yarn test`.
* [x] The linter passes with `yarn lint`. (Fix errors with `yarn prettier`.)
* [x] The relevant examples still work. (Run examples with `yarn watch`.)
#### Does this fix any issues or need any specific reviewers?
Fixes: #1996
Reviewers: @ianstormtaylor
