And fix failing test along the way:
```
2022-11-11T12:37:47.0413934Z === RUN TestResetDB
2022-11-11T12:37:47.0414557Z 2022-11-11T12:36:54.510Z INFO initial gas supply is not set or wrong, setting default value {"InitialGASSupply": "52000000"}
2022-11-11T12:37:47.0415288Z 2022-11-11T12:36:54.510Z INFO MaxBlockSize is not set or wrong, setting default value {"MaxBlockSize": 262144}
2022-11-11T12:37:47.0416020Z 2022-11-11T12:36:54.510Z INFO MaxBlockSystemFee is not set or wrong, setting default value {"MaxBlockSystemFee": 900000000000}
2022-11-11T12:37:47.0416786Z 2022-11-11T12:36:54.510Z INFO MaxTransactionsPerBlock is not set or wrong, using default value {"MaxTransactionsPerBlock": 512}
2022-11-11T12:37:47.0417725Z 2022-11-11T12:36:54.510Z INFO MaxValidUntilBlockIncrement is not set or wrong, using default value {"MaxValidUntilBlockIncrement": 5760}
2022-11-11T12:37:47.0418415Z 2022-11-11T12:36:54.510Z INFO Hardforks are not set, using default value
2022-11-11T12:37:47.0419272Z 2022-11-11T12:36:54.523Z INFO no storage version found! creating genesis block
2022-11-11T12:37:47.0419997Z 2022-11-11T12:36:54.529Z INFO chain is already at the proper state {"height": 0}
2022-11-11T12:37:47.0420974Z testing.go:1097: TempDir RemoveAll cleanup: remove C:\Users\RUNNER~1\AppData\Local\Temp\TestResetDB671187463\001\chains\privnet\000001.log: The process cannot access the file because it is being used by another process.
2022-11-11T12:37:47.0421606Z --- FAIL: TestResetDB (1.99s)
```
client_test.go:1935:
Error Trace: /home/rik/dev/neo-go/pkg/services/rpcsrv/client_test.go:1935
Error: Should NOT be empty, but was 00000000-0000-0000-0000-000000000000
Test: TestClient_Iterator_SessionConfigVariations/sessions_disabled
It's obviously empty, since we have sessions disabled, but it was not
considered to be empty in testify 1.7.0, now it is, see 840cb80149
There is a security issue found in github.com/btcsuite/btcd that we don't care
about (we're only using 256k1 implementation), but GitHub complains about
it. We could update to github.com/btcsuite/btcd/btcec/v2, but it's now just a
thin wrapper over github.com/decred/dcrd/dcrec/secp256k1/v4, so we better use
it directly.
* strip NEP-XX methods before going into generator to avoid unused imports
* nepXX.Invoker types already include Call
* always import util, it's used for Hash
