Update golangci-lint config and fix linting issues (#168)

* update golangci

* update golang lint yml and updated linting issues

x/evm/keeper.go

@@ -34,7 +34,7 @@ func (c *count) get() int {
 }
 
 func (c *count) increment() {
-	*c = *c + 1
+	*c++
 }
 
 func (c *count) reset() {

x/evm/types/querier.go

@@ -66,7 +66,7 @@ type QueryETHLogs struct {
 }
 
 func (q QueryETHLogs) String() string {
-	return string(fmt.Sprintf("%+v", q.Logs))
+	return fmt.Sprintf("%+v", q.Logs)
 }
 
 // QueryBloomFilter is response type for tx logs query