store: return hash changes from getMigrationsToBeApplied

[dirkdev98]

Closes #333

[github-actions]

==== Benchmark result ====

Total benchmarks: 9
          Passed: 9
          Failed: 0
-----------
object validator simple      5000000  iterations     475  ns/op
object validator nested        50000  iterations   50948  ns/op
logger - strings              500000  iterations    3701  ns/op
logger - objects              500000  iterations    3788  ns/op
logger - deep objects         200000  iterations    5268  ns/op
uuid                         2000000  iterations     555  ns/op
uuid.isValid                10000000  iterations     167  ns/op
isNil                      500000000  iterations       0  ns/op
isPlainObject              100000000  iterations      20  ns/op

[github-actions]

==== Benchmark result ====

Total benchmarks: 9
          Passed: 9
          Failed: 0
-----------
object validator simple      5000000  iterations     408  ns/op
object validator nested        50000  iterations   40513  ns/op
logger - strings              500000  iterations    2836  ns/op
logger - objects              500000  iterations    3523  ns/op
logger - deep objects         200000  iterations    5797  ns/op
uuid                         5000000  iterations     448  ns/op
uuid.isValid                10000000  iterations     135  ns/op
isNil                      500000000  iterations       0  ns/op
isPlainObject              100000000  iterations      16  ns/op

[github-actions]

==== C8 test coverage ====
Statements: 79.04% ( 15845/20048 )
Branches : 78.3% ( 1920 /2452 )
Functions : 75.24% ( 553 /735 )
Lines : 79.04% ( 15845 /20048 )