beacon Fix: Updated/Replacing dependencies used.

Fixes #184

Describe the changes you have made in this PR -

The first thing that was breaking on android side was the compileSdkVersion which was set to 30 previously which needed to be 30 to fix the following error Screenshot 1.
in android android/build.gradle needed update in ext.kotlin_version to resolve the following error shown in Screenshot 2.
The second fix was to update package
- graphql_flutter was needed updated to latest version. Which required connectivity_plus to be updated to its latest version which in turn required rxdart to be updated to its latest version. This was done to resolve the error shown in Screenshot 3.
- flutter_duration_picker is no longer maintained by the owner hence the newer updated fork published as a package on pub dev was used. This was done to resolve error shown in Screenshot 4.
Added .env to gitignore to ensure the environment variables don't get pushed to GitHub.

Screenshots of the changes (If any) -

Feb 21 '23 21:02 CyberWake

Hey @CyberWake, could you rebase your changes to the main branch here, as all the changes and commits are currently being added there?

Mar 11 '23 17:03 ItsAdityaKSingh

@ItsAdityaKSingh could you please review this PR.

Mar 15 '23 04:03 CyberWake

@ItsAdityaKSingh could you please review this PR.

You need to rebase this PR to the main branch of the beacon; currently, it is aimed at the development branch.

Mar 18 '23 11:03 ItsAdityaKSingh