21.3.0

• 8cd5d5a Merge pull request #334 from NewsWhip/APP-836-tooltip-accessibility
• 7383980 bump version
• 3de336e APP-836 prettier fix
• e7cb6c6 APP-836 check for content type
• 0a21c54 APP-836 normalize inline and remove redundant null check
• 60de210 APP-836 remove showOnFocus
• fdfa48a APP-836 move ngOnDestroy to bottom of file
• c499718 APP-836 underscore protected members
• c8ba60f APP-836 update comments
• ac38c6f APP-836 tidy up
• 9d547b2 APP-836 variable arrow size
• 942987e bump version
• 38ed259 APP-836 drop the Nw prefix from the callout class names
• 49ba75b APP-836 bump version to 21.3.0-beta.0
• c62a248 APP-836 reserve room for the popover close button
• 5e19c58 APP-836 dont export callout base directive
• bac0994 APP-826 prettier fix
• 1f0d227 APP-836 split tooltips and popovers
• 349c5f6 Remove duplicated API tab block from the tooltips docs page