0.4.1

• convert to typescript
• convert to functional component
• remove + - buttons
• remove debug view
• remove unused functions
• enable middle click to reset
• use css transitions for animation instead of animation by code
• use named export instead of default export
• update docs
• update code style (use prettier, lose semicolons)
• update webpack settings (required after typescript conversion)
• instead of wrapping <img /> provide the src and alt directly to <PinchZoomPanImage src="..." />