fix: add back in bellperson and remove filecoin-hashers

Cargo.toml

@@ -10,12 +10,12 @@ readme = "README.md"
 
 [dependencies]
 anyhow = "1.0.26"
+bellperson = "0.26.0"
 bincode = "1.1.2"
 blstrs = "0.7"
 lazy_static = "1.2"
 serde = "1.0.104"
 filecoin-proofs-v1 = { package = "filecoin-proofs", version = "~18.1.0", default-features = false }
-filecoin-hashers = { version = "~13.1.0", default-features = false, features = ["poseidon", "sha256"] }
 fr32 = { version = "~11.1.0", default-features = false }
 storage-proofs-core = { version = "~18.1.0", default-features = false }