Rename storage type inmemory to memory

This is technically a breaking change, but given how long ago this field was implemented as well as the fact that this is the default value if the type is not specified, I doubt anybody's explicitly setting it as inmemory

storage/storage.go

@@ -57,7 +57,7 @@ func Initialize(cfg *Config) error {
 		if err != nil {
 			return err
 		}
-	case TypeInMemory:
+	case TypeMemory:
 		fallthrough
 	default:
 		if len(cfg.File) > 0 {

storage/storage_test.go

@@ -32,13 +32,13 @@ func TestInitialize(t *testing.T) {
 			ExpectedErr: nil,
 		},
 		{
-			Name:        "inmemory-no-file",
-			Cfg:         &Config{Type: TypeInMemory},
+			Name:        "memory-no-file",
+			Cfg:         &Config{Type: TypeMemory},
 			ExpectedErr: nil,
 		},
 		{
-			Name:        "inmemory-with-file",
-			Cfg:         &Config{Type: TypeInMemory, File: t.TempDir() + "/TestInitialize_inmemory-with-file.db"},
+			Name:        "memory-with-file",
+			Cfg:         &Config{Type: TypeMemory, File: t.TempDir() + "/TestInitialize_memory-with-file.db"},
 			ExpectedErr: nil,
 		},
 		{

storage/type.go

@@ -4,6 +4,6 @@ package storage
 type Type string
 
 const (
-	TypeInMemory Type = "inmemory" // In-memory store
-	TypeSQLite   Type = "sqlite"   // SQLite store
+	TypeMemory Type = "memory" // In-memory store
+	TypeSQLite Type = "sqlite" // SQLite store
 )