v2.6.0

• Modified ripple event to occur on mouseup.
• Fixed bug where original placement data attribute was being removed in dispose method in Popper.
• Fixed modal header styling.
• Fixed offcanvas header styling.
• Fixed nested accordion styling.
• Fixed visually-hidden styling.
• Fixed card-group styling.
• Fixed outline btn styling.
• Fixed active btn styling.
• Fixed check btn styling.
• Renamed max-width and max-height utility classes.
• Added min-width and min-height utility classes.
• Added resize utility classes.
• Updated demos.
• Updated tests.
• Updated NPM.