Bug fix

[Karan-S-Mittal]

Issues Resolved

• [x] #108 : Added ontouch events
• [x] #132: gauge label font size now changes with scale
• [x] #103: show current value of knob
• [x] #102: Dash Daq slider defaults to correct value when value is set to 0
• [x] #94: Added Flex default Direction to remove ambiguity
• [x] #8: Added a new prop textColor in gauge, tank, and knob to change text color of scale and current value
• [x] #153: give more space to BooleanSwitch, Slider component, for led display there is already backgroundColor
• [x] #40: closed with comment
• [x] #35: handle label prop in slider component