chore: cfg-if, rand, md5 made optional only for v1 ciphers

Author: zonyitoo

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "shadowsocks-crypto"
-version = "0.5.5"
+version = "0.5.6"
 authors = ["luozijun <luozijun.assistant@gmail.com>", "ty <zonyitoo@gmail.com>"]
 edition = "2021"
 license = "MIT"
@@ -13,7 +13,7 @@ rust-version = "1.61"
 
 [features]
 default = ["v1", "v1-aead"]
-v1 = []
+v1 = ["md-5", "rand", "cfg-if"]
 v1-stream = ["v1", "chacha20", "aes", "ctr", "camellia"]
 v1-aead = ["v1", "aes-gcm", "chacha20poly1305", "hkdf", "sha1"]
 v1-aead-extra = [
@@ -33,14 +33,14 @@ v2-extra = ["v2", "chacha20poly1305/reduced-round"]
 ring = ["ring-compat"]
 
 [dependencies]
-cfg-if = "1.0"
-rand = "0.8"
+cfg-if = { version = "1.0", optional = true }
+rand = { version = "0.8", optional = true }
 aes-gcm = { version = "0.10", optional = true }
 aes-gcm-siv = { version = "0.11", optional = true }
 ccm = { version = "0.5", optional = true }
 chacha20poly1305 = { version = "0.10", optional = true }
 ring-compat = { version = "0.8", optional = true }
-md-5 = { version = "0.10" }
+md-5 = { version = "0.10", optional = true }
 hkdf = { version = "0.12", optional = true }
 sha1 = { version = "0.10", optional = true }
 blake3 = { version = "1.3", optional = true }