fix: export PChainOwner and ConvertSubnetValidator

Author: meeh0w

src/serializable/fxs/pvm/index.ts

@@ -0,0 +1,2 @@
+export * from './convertSubnetValidator';
+export * from './pChainOwner';

src/serializable/index.ts

@@ -5,6 +5,7 @@ export * as avmSerial from './avm';
 export * as evmSerial from './evm';
 export * from './fxs/secp256k1';
 export * from './fxs/common';
+export * from './fxs/pvm';
 export * as pvmSerial from './pvm';
 export * from './primitives';
 export * from './constants';