build: update env_logger to 0.11

Author: ystreet

.github/workflows/rust.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        toolchain: ['1.65', stable]
+        toolchain: ['1.71', stable]
 
     steps:
     - uses: actions/checkout@v2
@@ -27,7 +27,7 @@ jobs:
         override: true
     - name: Use MSRV Cargo.lock
       run: cp Cargo.lock.msrv Cargo.lock
-      if: matrix.toolchain == '1.65'
+      if: matrix.toolchain == '1.71'
     - name: Build
       run: cargo build --verbose
   test: