[EuiDatePicker] react-datepicker to src/; use EUI services

.eslintignore

@@ -11,3 +11,4 @@ packages
 scripts
 generator-eui
 cypress
+react-datepicker

.npmignore

@@ -6,7 +6,6 @@ wiki/
 generator-eui/
 test/
 src-docs/
-packages/react-datepicker
 packages/eslint-plugin
 .nvmrc
 cypress

.sass-lint.yml

@@ -6,6 +6,7 @@ files:
     # These are themes of outside libraries we import
     - 'src/components/series_chart/**/*.s+(a|c)ss'
     - 'src/global_styling/react_date_picker/**/*.s+(a|c)ss'
+    - 'src/components/date_picker/react-datepicker/**/*.s+(a|c)ss'
 rules:
   quotes:
     - 2

CHANGELOG.md

@@ -1,6 +1,10 @@
 ## [`main`](https://github.com/elastic/eui/tree/main)
 
-No public interface changes since `41.1.0`.
+- Updated `EuiDatePicker` to use `EuiPopover`, `EuiFocusTrap`, and `EuiScreenReaderOnly` ([#5339](https://github.com/elastic/eui/pull/5339))
+
+**Bug fixes**
+
+- Fixed `EuiDatePicker` being constrained to its parent container by using React portal ([#5339](https://github.com/elastic/eui/pull/5339))
 
 ## [`41.1.0`](https://github.com/elastic/eui/tree/v41.1.0)