Cleanup many lint warnings

Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>

build/parameters.go

@@ -2,6 +2,6 @@ package build
 
 import rice "github.com/GeertJohan/go.rice"
 
-func ParametersJson() []byte {
+func ParametersJSON() []byte {
 	return rice.MustFindBox("proof-params").MustBytes("parameters.json")
 }

build/version.go

@@ -33,6 +33,7 @@ func (ve Version) EqMajorMinor(v2 Version) bool {
 // APIVersion is a semver version of the rpc api exposed
 var APIVersion Version = newVer(0, 3, 0)
 
+//nolint:varcheck
 const (
 	majorMask = 0xff0000
 	minorMask = 0xffff00