chore: move noUncheckedIndexedAccess from base config to the lib config

Author: haoqunjiang

tsconfig.json

@@ -32,9 +32,7 @@
     // Strict mode is on by default in TS 6+
     "strict": true,
 
-    // See <https://www.semver-ts.org/formal-spec/5-compiler-considerations.html#strictness>
-    // These 2 options are also part of the recommended tsconfig as of TS 5.9
-    "noUncheckedIndexedAccess": true,
+    // This option is part of the recommended tsconfig as of TS 5.9.
     // Commented out for now. It's hard to land in the current ecosystem.
     // Needs more consensus before moving forward.
     // "exactOptionalPropertyTypes": true,

tsconfig.lib.json

@@ -9,5 +9,13 @@
     // For example, its types must be compatible with the Vue types.
     // So we don't want to skip the type checking of its dependencies.
     "skipLibCheck": false,
+
+    // See <https://www.semver-ts.org/formal-spec/5-compiler-considerations.html#strictness>
+    // Part of the recommended tsconfig as of TS 5.9.
+    // Flags starting with `no` are likely to have false positives,
+    // So they are not suitable for existing codebases, but are recommended for new codebases,
+    // as well as libraries that need to be more strict about their types.
+    // See also <https://github.com/vuejs/tsconfig/issues/38#issuecomment-3524621112> for more discussion.
+    "noUncheckedIndexedAccess": true,
   }
 }