Added the ability for text to start in a typed out.

[Ajbadenhorst]

An example of how this prop can be used is the following, used in react-native to switch to "Number copied to clipboard" text being typed out when copying.

    <TypeWriter
            startTyped={copied ? false : true}
            fixed
            minDelay={10}
            maxDelay={10}
            typing={copied ? 1 : 0}
            onTypingEnd={async () => {
              await sleep(1500)
              this.setState({
                copied: false
              })
            }}
          >
            <Text titleBlue={copied} bold primary size={11}>
              {copied ? "Number copied to clipboard" : item.description}
            </Text>
          </TypeWriter>