Allow newer versions of mysql-async and mobc

Author: weiznich

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "diesel-async"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Georg Semmler <[email protected]>"]
 edition = "2018"
 autotests = false
@@ -18,13 +18,13 @@ async-trait = "0.1.51"
 futures-channel = { version = "0.3.17", default-features = false, features = ["std", "sink"], optional = true }
 futures-util = { version = "0.3.17", default-features = false, features = ["std", "sink"] }
 tokio-postgres = { version = "0.7.2", optional = true}
-tokio = { version = "1", optional = true}
-mysql_async = { version = "0.30.0", optional = true}
+tokio = { version = "1.26", optional = true}
+mysql_async = { version = ">=0.30.0,<0.32", optional = true}
 mysql_common = {version = "0.29.0", optional = true}
 
 bb8 = {version = "0.8", optional = true}
 deadpool = {version = "0.9", optional = true}
-mobc = {version = "0.7", optional = true}
+mobc = {version = ">=0.7,<0.9", optional = true}
 scoped-futures = {version = "0.1", features = ["std"]}
 
 [dev-dependencies]