Fix the build.gradle.kts where the version master-SNAPSHOT:uber was not found

[lijamie98]

We should either fix the version to the latest release or create the master-SNAPSHOT:uber.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.06%. Comparing base (5cbfe0c) to head (8012a91).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #682   +/-   ##
=========================================
  Coverage     80.06%   80.06%           
  Complexity     1210     1210           
=========================================
  Files           212      212           
  Lines          4790     4790           
  Branches        406      406           
=========================================
  Hits           3835     3835           
  Misses          703      703           
  Partials        252      252           

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[overcat]

Hi @lijamie98, when the user first retrieves this library from JitPack, JitPack will automatically create a release, which takes some time. I noticed that the master uber has been created correctly. https://jitpack.io/com/github/lightsail-network/java-stellar-sdk/master-SNAPSHOT/

[overcat]

But I think we can make some improvements by building immediately after each commit, instead of waiting for the user to try to fetch it: https://docs.jitpack.io/building/#building-ahead-of-time

[lijamie98]

For the example classes, can we consider use the most recent stable release instead of the edge (master-SNAPPSHOT)?