Because spot ^0.3.2 depends on test_api >=0.3.0 <0.7.0 and spot >=0.4.0 <0.11.0 depends on checks ^0.2.2, spot >=0.3.2 <0.11.0 requires test_api >=0.3.0 <0.7.0 or checks ^0.2.2.
Because checks 0.2.2 depends on test_api >=0.5.0 <0.7.0 and no versions of checks match >0.2.2 <0.3.0, checks ^0.2.2 requires test_api >=0.5.0 <0.7.0.
Thus, spot >=0.3.2 <0.11.0 requires test_api >=0.3.0 <0.7.0.
And because every version of flutter_test from sdk depends on test_api 0.7.0, spot >=0.3.2 <0.11.0 is incompatible with flutter_test from sdk.
So, because wiredash depends on both flutter_test from sdk and spot >=0.3.2 <0.5.0, version solving failed.
This fixes error like this: