fix: Include hook hints in evaluation options type. (#250)
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## This PR
In section 4.5.1 of hooks it specifies:
```
> `Flag evaluation options` **MAY** contain `hook hints`, a map of data to be provided to hook invocations.
```
But it does not include this in the types.md file, which makes this a
bit confusing.
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Signed-off-by: Ryan Lamb <4955475+kinyoklion@users.noreply.github.com>

chore: fix provider given clause
Signed-off-by: Todd Baert <todd.baert@dynatrace.com>

feat: add events (#182)
Signed-off-by: Todd Baert <todd.baert@dynatrace.com>
Co-authored-by: Justin Abrahms <justin@abrah.ms>
Co-authored-by: Lukas Reining <lukas.reining@codecentric.de>
Co-authored-by: Michael Beemer <beeme1mr@users.noreply.github.com>
Co-authored-by: Kavindu Dodanduwa <kavindudodanduwa@gmail.com>
Co-authored-by: Thomas Poignant <thomas.poignant@gofeatureflag.org>
Co-authored-by: Tom Carrio <tom@carrio.dev>
Co-authored-by: Ryan Lamb <4955475+kinyoklion@users.noreply.github.com>
Co-authored-by: Ben Rometsch <benrometsch@gmail.com>
Co-authored-by: Pete Hodgson <git@thepete.net>

fix: links and link checks (#172)
Signed-off-by: Todd Baert <toddbaert@gmail.com>

chore: section clarity, harden API, providers (#149)
**Marking Evaluation API and Providers `hardening`** and a few
non-functional changes here that improve structure.
specifically:
- explicitly mark and number all sections
- section headings have consistent numbering (provider section numbering
was different than the other docs)
- removed "draft" language 
An alternative to marking all of `provider` and `evaluation API` as
hardening would be just marking all existing sections therein as
hardening, which might be better since we'd have to do that anyway if we
added a new experimental section.
see: #146 for more on release
goals.
Signed-off-by: Todd Baert <toddbaert@gmail.com>

feat!: make error code an enum and include optional error message (#142)
See #141 for context.
Signed-off-by: Ryan Lamb <4955475+kinyoklion@users.noreply.github.com>
Co-authored-by: Todd Baert <toddbaert@gmail.com>

removed evaluation options from provider method signatures (#134)
BREAKING CHANGE
Resolves: #133 
Signed-off-by: James-Milligan <james@omnant.co.uk>

Consolidate evaluation context merge order in the spec (#132)
Signed-off-by: Michael Beemer <beeme1mr@users.noreply.github.com>

Merge pull request #129 from toddbaert/feat/remove-xformation
Remove context transformation, ref in provider hooks

Merge pull request #119 from open-feature/provider-hooks
Remove context transformers. Add provider hooks