Update diesel to 2.0

Author: weiznich

Cargo.lock

@@ -9,7 +9,7 @@ license = "AGPL-v3"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-diesel = { version = "2.0.0-rc.1", default-features = false, features = ["i-implement-a-third-party-backend-and-opt-into-breaking-changes"]}
+diesel = { version = "2.0.0", default-features = false, features = ["i-implement-a-third-party-backend-and-opt-into-breaking-changes"]}
 async-trait = "0.1.51"
 futures = "0.3.17"
 tokio-postgres = { version = "0.7.2", optional = true}