feature: possibility to pass stylesheet for the floating touchable opacity

[filipenatanael]

• feature: possibility to pass stylesheet for the floating touchable opacity
• hotfix: remove warming componentWillMount is deprecated
• docs: update documentation

    <PopoverTooltip
        overlayButtonStyle={{
          ...RN.Platform.select({
            android: {
              marginTop: -22,
            },
            ios: {
              marginTop: 0,
            },
          }),
        }}
      />