Fix zbar warnings in browser

[joeldhenry]

zbar has 2 warnings when running in browser - see demo.

[samsam2310]

This is a workaround for issue webpack/6725

[joeldhenry]

that doesn't seem to resolve the issue (or even compile). my currently web pack implementation is the answer from #8

[samsam2310]

The warning is because we use .wasm.bin for the extension of wasm files. This is a workaround for webpack/6725 because if we use .wasm the webpack will try to parse wasm files and ignore the file-loader.

These warning are expected. And I should not cause any issue when using it.