build: use more specific dependency version format (#7)

Author: hseeberger

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pub-sub-client"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2021"
 rust-version = "1.58"
 
@@ -13,19 +13,19 @@ repository = "https://github.com/hseeberger/pub-sub-client"
 documentation = "https://github.com/hseeberger/pub-sub-client"
 
 [dependencies]
-base64 = "0.*"
-goauth = "0.*"
-reqwest = { version = "0.*", features = [ "json" ] }
+base64 = "0.13"
+goauth = "0.11"
+reqwest = { version = "0.11", features = [ "json" ] }
 serde = { version = "1.0", features = [ "derive" ] }
 serde_json = "1.0"
-smpl_jwt = "0.*"
+smpl_jwt = "0.6"
 thiserror = "1.0"
-time = { version = "0.*", features = [ "serde-well-known" ] }
-tracing = "0.*"
-tracing-subscriber = { version = "0.*", features = [ "env-filter", "fmt", "json", "tracing-log" ] }
+time = { version = "0.3", features = [ "serde-well-known" ] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = [ "env-filter", "fmt", "json", "tracing-log" ] }
 
 [dev-dependencies]
 anyhow = "1.0"
 # TODO switch to the standard release once Pub/Sub has been included; until then use "dev"
 testcontainers = { git = "https://github.com/testcontainers/testcontainers-rs", branch = "dev" }
-tokio = { version = "1", features = [ "full" ] }
+tokio = { version = "1.15", features = [ "full" ] }