[ref] kv_typed: remove StringErr

.cargo/config

Cargo.lock

rust-bins/duniter-dbex/src/export_bc.rs

rust-libs/duniter-dbs/Cargo.toml

rust-libs/duniter-dbs/src/keys/all.rs

rust-libs/duniter-dbs/src/keys/block_number.rs

rust-libs/duniter-dbs/src/keys/blockstamp.rs

rust-libs/duniter-dbs/src/keys/dunp_node_id.rs

rust-libs/duniter-dbs/src/keys/hash.rs

rust-libs/duniter-dbs/src/keys/pubkey.rs

rust-libs/duniter-dbs/src/keys/pubkey_and_sig.rs

rust-libs/duniter-dbs/src/keys/source_key.rs

rust-libs/duniter-dbs/src/keys/timestamp.rs

rust-libs/duniter-dbs/src/keys/ud_id.rs

rust-libs/duniter-dbs/src/keys/uid.rs

rust-libs/duniter-dbs/src/keys/utxo_id.rs

rust-libs/duniter-dbs/src/keys/wallet_conditions.rs

rust-libs/duniter-dbs/src/keys/wallet_hash_with_bn.rs

rust-libs/duniter-dbs/src/lib.rs

rust-libs/duniter-dbs/src/values/block_db.rs