Make setting commit hooks a noop if unsupported

We set them to null when closing databases, and crashing if the methods
are unavailable (which they are on older WebAssembly modules) is
terrible.

sqlite3/CHANGELOG.md

@@ -1,3 +1,9 @@
+## 2.7.1
+
+- Web: Fix a crash when using version `2.7.0` of this package with an older
+  WebAssembly bundle.
+  Note: Version `2.7.0` has been retracted from pub.dev for this reason.
+
 ## 2.7.0
 
 - Add support for commit and rollback hooks as well as a predicate that can

sqlite3/lib/src/wasm/wasm_interop.dart

@@ -297,11 +297,11 @@ class WasmBindings {
   }
 
   void dart_sqlite3_commits(Pointer db, int id) {
-    return _commit_hooks!.callReturningVoid2(db.toJS, id.toJS);
+    return _commit_hooks?.callReturningVoid2(db.toJS, id.toJS);
   }
 
   void dart_sqlite3_rollbacks(Pointer db, int id) {
-    return _rollback_hooks!.callReturningVoid2(db.toJS, id.toJS);
+    return _rollback_hooks?.callReturningVoid2(db.toJS, id.toJS);
   }
 
   int sqlite3_exec(Pointer db, Pointer sql, Pointer callback,

sqlite3/pubspec.yaml

@@ -1,6 +1,6 @@
 name: sqlite3
 description: Provides lightweight yet convenient bindings to SQLite by using dart:ffi
-version: 2.7.0
+version: 2.7.1
 homepage: https://github.com/simolus3/sqlite3.dart/tree/main/sqlite3
 issue_tracker: https://github.com/simolus3/sqlite3.dart/issues