Bump MSRV to 1.38.0: fixes crossbeam-utils dev-dependency

Author: dhardy

.github/workflows/test.yml

@@ -47,7 +47,7 @@ jobs:
             # Test both windows-gnu and windows-msvc; use beta rust on one
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
-            toolchain: 1.36.0 # MSRV
+            toolchain: 1.38.0 # MSRV
           - os: ubuntu-latest
             deps: sudo apt-get update ; sudo apt install gcc-multilib
             target: i686-unknown-linux-gnu
@@ -85,13 +85,13 @@ jobs:
           cargo test --target ${{ matrix.target }} --lib --tests --no-default-features --features=alloc,getrandom,small_rng
           cargo test --target ${{ matrix.target }} --examples
       - name: Test rand (all stable features, non-MSRV)
-        if: ${{ matrix.toolchain != '1.36.0' }}
+        if: ${{ matrix.toolchain != '1.38.0' }}
         run: |
           cargo test --target ${{ matrix.target }} --features=serde1,log,small_rng,min_const_gen
       - name: Test rand (all stable features, MSRV)
-        if: ${{ matrix.toolchain == '1.36.0' }}
+        if: ${{ matrix.toolchain == '1.38.0' }}
         run: |
-          # const generics are not stable on 1.36.0
+          # const generics are not stable on 1.38.0
           cargo test --target ${{ matrix.target }} --features=serde1,log,small_rng
       - name: Test rand_core
         run: |