`plutusv3` not supported in Blockfrost backend

[rmgaray]

A call to utxosAt with the Blockfrost backend fails for addresses containing UTxOs with PlutusV3 reference scripts:

Uncaught Error: (ClientDecodeJsonError ("{\"script_hash\":\"1d9c0b541adc300c19ddc6b9fb63c0bfe32b1508305ba65b8762dc7b\",\"type\":\"plutusV3\",\"serialised_size\":2679}") (AtKey "type" (TypeMismatch "language: expected 'native' or 'plutusV{1|2}', got: plutusV3")))

The address triggering this error is addr1wy8ccvgzslpjf9yhrprvmqulpmjpkpxf8c0hvtjwvw8n6pqdcrnp0.

[rmgaray]

The linked PR seems to work fine with the address in the description.