Bump MSRV to 1.71 (for console 0.16.1)

Author: djc

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
           - os: windows-latest
             rust: stable
           - os: ubuntu-latest
-            rust: 1.66.0
+            rust: 1.71.0
     runs-on: ${{ matrix.os }}
     steps:
       - name: Install rust

Cargo.toml

@@ -3,7 +3,7 @@ name = "dialoguer"
 description = "A command line prompting library."
 version = "0.12.0"
 edition = "2021"
-rust-version = "1.66"
+rust-version = "1.71"
 keywords = ["cli", "menu", "prompt"]
 categories = ["command-line-interface"]
 license = "MIT"