fix: Make lanes mutually exclusive by default (#206)

* lanes always mutually exclusive

* nit 1.0.0.0

* gg adding back interface

---------

Co-authored-by: Alex Johnson <alex@skip.money>

tests/integration/block_sdk_integration_test.go

@@ -23,7 +23,7 @@ import (
 
 var (
 	// config params
-	numValidators = 1
+	numValidators = 4
 	numFullNodes  = 0
 	denom         = "stake"
 

tests/integration/chain_setup.go

@@ -47,7 +47,7 @@ type KeyringOverride struct {
 // and returns the associated chain
 func ChainBuilderFromChainSpec(t *testing.T, spec *interchaintest.ChainSpec) ibc.Chain {
 	// require that NumFullNodes == NumValidators == 4
-	require.Equal(t, *spec.NumValidators, 1)
+	require.Equal(t, *spec.NumValidators, 4)
 
 	cf := interchaintest.NewBuiltinChainFactory(zaptest.NewLogger(t), []*interchaintest.ChainSpec{spec})