add possibility to use two instances in parallel

[konsultaner]

I did not open an issue for this feature request.
I want to work with multiple secrets on the same local storage. This is not possible because all meta data get encoded under the same key. Thats why I needed to reparate them. I introduced a encryptionRealm to make it possible.

I added the test and examples. I hope you are ok with this feature. If you merge you need to update the version and build again, because my builds have a wrong version now...

[coveralls]

Coverage increased (+0.4%) to 86.46% when pulling 2ef4862 on konsultaner:master into b318562 on softvar:master.

[konsultaner]

I managed it to update the version. So there should be no further commits necessary.

[softvar]

@konsultaner It's good to have feature. I reviewed your work and it looks good to me 👍
The only thing which I think should be changed is the name of the key. I couldn't get in the first round what does encryptionRealm mean.
Also, it would be great if you could update the README.md with the explanation. It would be very useful for the users to know and understand such thing is also provided by the lib.

Great work 👍

[konsultaner]

@softvar What about encryptionNamespace?

[konsultaner]

@softvar Is there still something you worry about? I'm done with this PR so far.

[konsultaner]

@softvar regarding #22. I could fix this issue with this PR if

• Do not default store allKeyData as base64, which is super unsecure and removing the password from the ls
• @jas- fix Security issue regarding derived key: Ref: Issue #6 & #13 #15 by removing the default password and make passing a password for all but base64 mandatory and not optional anymore

do want me to do so?

[softvar]

@konsultaner That's great. Thanks for doing this.

[softvar]

Merged. Updated yarn.lock and map files due to the changes. Tagged.
v1.2.5 contains your changes 👍
Awesome!