Updated package.json to use the correct casing for the 'main' entrypoint

[meDavid]

In the rollup script 'angularFire2.umd.js' is used, where in the package.json 'angularfire2.umd.js' was used, causing for loading problems on linux based systems (Ubuntu in this case)

https://github.com/angular/angularfire2/blob/master/rollup.publish.config.js#L5

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[davideast]

@meDavid The casing is wrong on our side actually. We'd rather change the casing in the rollup config.

https://github.com/angular/angularfire2/blob/master/rollup.publish.config.js#L5
https://github.com/angular/angularfire2/blob/master/rollup.test.config.js#L7

Would you like to change those two files and then I'll merge the PR?

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We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for the commit author(s). If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.

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We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for the commit author(s). If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.

[meDavid]

I signed and modified the github accountname for the CLA

[meDavid]

@davideast
I didn't modify https://github.com/angular/angularfire2/blob/master/rollup.test.config.js#L7 as it was the module name and not the file name. The rollup test config doesn't affect this issue as it uses a totally different filename.

[maxmumford]

This has been merged now under #599. Thanks @meDavid for finding and providing the fix.

[meDavid]

@maxmumford The CLA check no longer worked for me. I updated the CLA details to contain my github username, but it didn't update the cla label.