Add 'startScanning' method to expose externally #14
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When I obtained the result by scanning the QR code, I presented it on the page and then deleted the result from the page, attempting to scan the same QR code again, but I was unable to obtain the result again.
I have tried the 'init' method, but the dom will be recreated, which is not ideal.
What I am currently doing is to stop scanning after deleting the results (ref. value. stopScanning), and in nextTick (ref. value. startScanning), I can obtain my results.