fix: Limit triomphe dependency to <=0.1.10 (#83)

Our SDK uses `moka` for some unit tests, which in turn has a dependency
on `triomphe`. `triomphe` does not provide an MSRV, resulting in their
latest release breaking on rustc 1.74.

To avoid bumping our own MSRV to 1.76 for now, we are going to force the
`triomphe` dependency to be <=0.1.10. Once we bump rustc in the future,
we can clean up this change.

launchdarkly-server-sdk/Cargo.toml

@@ -4,6 +4,8 @@ description = "LaunchDarkly Server-Side SDK"
 version = "2.1.0"
 authors = ["LaunchDarkly"]
 edition = "2021"
+# TODO: When you change this to 1.76+, remove the explicit triomphe dependency
+# below.
 rust-version = "1.74.0"  # MSRV
 license = "Apache-2.0"
 homepage = "https://docs.launchdarkly.com/sdk/server-side/rust"
@@ -31,6 +33,10 @@ tokio = { version = "1.17.0", features = ["rt-multi-thread"] }
 parking_lot = "0.12.0"
 tokio-stream = { version = "0.1.8", features = ["sync"] }
 moka = { version = "0.12.1", features = ["sync"] }
+# NOTE: This dependency is only here to deal with a rustc compliation issue.
+# Once we move to rustc 1.76, we should be able to remove this explicit
+# dependency.
+triomphe = { version = "<=0.1.10" }
 uuid = {version = "1.2.2", features = ["v4"] }
 hyper = { version = "0.14.19", features = ["client", "http1", "http2", "tcp"] }
 hyper-rustls = { version = "0.24.1" , optional = true}