fix: Bump MSRV to 1.70.0 (#61)

Co-authored-by: Casey Waldren <[email protected]>

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
 
       - name: Setup rust tooling
         run: |
-          rustup override set 1.68
+          rustup override set 1.70
           rustup component add rustfmt clippy
 
       - uses: ./.github/actions/ci
@@ -47,7 +47,7 @@ jobs:
 
       - name: Setup rust tooling
         run: |
-          rustup override set 1.68
+          rustup override set 1.70
           rustup component add rustfmt clippy
           rustup target add x86_64-unknown-linux-musl
 

.github/workflows/manual-publish.yml

@@ -19,7 +19,7 @@ jobs:
 
       - name: Setup rust tooling
         run: |
-          rustup override set 1.68
+          rustup override set 1.70
           rustup component add rustfmt clippy
 
       - uses: ./.github/actions/ci

.github/workflows/release-please.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Setup rust tooling
         if: ${{ steps.release.outputs.releases_created }}
         run: |
-          rustup override set 1.68
+          rustup override set 1.70
           rustup component add rustfmt clippy
 
       - uses: launchdarkly/gh-actions/actions/[email protected]

README.md

@@ -24,6 +24,12 @@ cargo run --example EXAMPLE_NAME
 
 Read our [documentation](https://docs.launchdarkly.com) for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the [complete reference guide for this SDK](https://docs.launchdarkly.com/sdk/server-side/rust).
 
+## Minimum Supported Rust Version
+
+This project aims to maintain compatibility with a Rust version that is at least six months old.
+
+Version updates may occur more frequently than the policy guideline states if external forces require it. For example, a CVE in a downstream dependency requiring an MSRV bump would be considered an acceptable reason to violate the six month guideline.
+
 ## Testing
 
 We run integration tests for all our SDKs using a centralized test harness. This approach gives us the ability to test for consistency across SDKs, as well as test networking behavior in a long-running application. These tests cover each method in the SDK, and verify that event sending, flag evaluation, stream reconnection, and other aspects of the SDK all behave correctly.

contract-tests/Cargo.toml

@@ -2,7 +2,7 @@
 name = "contract-tests"
 version = "0.1.0"
 edition = "2021"
-rust-version = "1.68.0"  # MSRV
+rust-version = "1.70.0"  # MSRV
 license = "Apache-2.0"
 
 [dependencies]

launchdarkly-server-sdk/Cargo.toml

@@ -4,7 +4,7 @@ description = "LaunchDarkly Server-Side SDK"
 version = "2.0.1"
 authors = ["LaunchDarkly"]
 edition = "2021"
-rust-version = "1.68.0"  # MSRV
+rust-version = "1.70.0"  # MSRV
 license = "Apache-2.0"
 homepage = "https://docs.launchdarkly.com/sdk/server-side/rust"
 repository = "https://github.com/launchdarkly/rust-server-sdk"