Relax the mpl metadata package constraint (#2366)

.gitignore

@@ -23,3 +23,4 @@ docker-target
 .rollup.cache/
 test-keypair.json
 tsconfig.tsbuildinfo
+.vscode

spl/Cargo.toml

@@ -26,4 +26,4 @@ serum_dex = { git = "https://github.com/openbook-dex/program/", rev = "1be91f2",
 solana-program = "1.13.5"
 spl-token = { version = "3.5.0", features = ["no-entrypoint"], optional = true }
 spl-associated-token-account = { version = "1.1.1", features = ["no-entrypoint"], optional = true }
-mpl-token-metadata = { version = "1.4.3", optional = true, features = ["no-entrypoint"] }
+mpl-token-metadata = { version = "^1.4.3", optional = true, features = ["no-entrypoint"] }