Update halo2 dependencies.

Cargo.toml

@@ -102,8 +102,8 @@ blake2b_simd = {version = "1.0.0", optional = true}
 pasta_curves = {version = "0.3.0", optional = true}
 crypto_api_chachapoly = {version = "0.5.0", optional = true}
 incrementalmerkletree = {version = "0.2.0", optional = true}
-halo2_proofs = {version = "0.1.0-beta.3", features = ["dev-graph", "gadget-traces", "sanity-checks"], optional = true}
-halo2_gadgets = {version = "0.1.0-beta.2", features = ["dev-graph", "test-dependencies"], optional = true}
+halo2_proofs = {version = "0.1.0-beta.4", features = ["dev-graph", "gadget-traces", "sanity-checks"], optional = true}
+halo2_gadgets = {version = "0.1.0-beta.3", features = ["dev-graph", "test-dependencies"], optional = true}
 
 # Smart contract runtime
 drk-sdk = {path = "src/sdk", optional = true}