Bump os-browserify dependency to 0.3.0

[bmeurer]

This fixes issue #66

[jsf-clabot]

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[medialwerk]

When will the commit be included? :-)

[bmeurer]

@jhnns promised to take a look.

[jhnns]

Thanks 👍
Shipped with 2.1.0 (should land in current webpack 3 installations)

[bmeurer]

Thank you!

[medialwerk]

Thanks!