Add some new linters.

.golangci.yml

@@ -5,16 +5,29 @@ linters:
   disable-all: true
   enable:
     - asciicheck
+    - bidichk
     - deadcode
+    - durationcheck
     - errcheck
+    - errchkjson
+    - errname
+    - exhaustive
+    - exportloopref
+    - goconst
     - gofmt
     - goimports
     - gosimple
     - govet
     - ineffassign
     - misspell
+    - nilerr
     - revive
+    - staticcheck
     - structcheck
+    - tparallel
+    - typecheck
     - unconvert
     - unparam
     - unused
+    - varcheck
+    - vetshadow

webapi/setaltsignaddr_test.go

@@ -72,11 +72,11 @@ func TestMain(m *testing.M) {
 	ctx, cancel := context.WithCancel(context.Background())
 	err = database.CreateNew(testDb, feeXPub)
 	if err != nil {
-		panic(fmt.Errorf("error creating test database: %v", err))
+		panic(fmt.Errorf("error creating test database: %w", err))
 	}
 	db, err = database.Open(ctx, &wg, testDb, time.Hour, maxVoteChangeRecords)
 	if err != nil {
-		panic(fmt.Errorf("error opening test database: %v", err))
+		panic(fmt.Errorf("error opening test database: %w", err))
 	}
 
 	// Run tests.