Add wcag criteria for selects (#179)

_checklist-web/select.md

@@ -142,4 +142,14 @@ Before you attempt to use one of these, be certain a native `<select>` is not an
 
 - [24 Accessibility : Select your poison](https://www.24a11y.com/2019/select-your-poison/)
 - [WebAxe.org: Accessible Custom Select Dropdowns](https://www.webaxe.org/accessible-custom-select-dropdowns/)
-- [WAI-ARIA listbox examples](https://www.w3.org/TR/2021/NOTE-wai-aria-practices-1.2-20211129/examples/combobox/combobox-select-only.html)
+- [WAI-ARIA listbox examples](https://www.w3.org/TR/2021/NOTE-wai-aria-practices-1.2-20211129/examples/combobox/combobox-select-only.html)
+
+### WCAG criteria
+- [WCAG 1.3.1 Info and Relationships (Level A)](https://www.w3.org/WAI/WCAG22/Understanding/info-and-relationships)
+- [WCAG 1.3.5 Identify Input Purpose (Level AA)](https://www.w3.org/WAI/WCAG22/Understanding/identify-input-purpose)
+- [WCAG 2.1.1 Keyboard (Level A)](https://www.w3.org/WAI/WCAG22/Understanding/keyboard)
+- [WCAG 2.4.6 Headings and Labels (Level AA)](https://www.w3.org/WAI/WCAG22/Understanding/headings-and-labels.html)
+- [WCAG 3.3.1 Error Identification (Level A)](https://www.w3.org/WAI/WCAG22/Understanding/error-identification)
+- [WCAG 3.3.2 Labels or Instructions (Level A)](https://www.w3.org/WAI/WCAG22/Understanding/labels-or-instructions) 
+- [WCAG 3.3.3 Error Suggestion (Level AA)](https://www.w3.org/WAI/WCAG22/Understanding/error-suggestion)
+- [WCAG 4.1.2 Name, Role, Value (Level A)](https://www.w3.org/WAI/WCAG22/Understanding/name-role-value)