Update to TaskChampion 2.0.2 (#3746)

src/taskchampion-cpp/Cargo.toml

@@ -3,13 +3,13 @@ name = "taskchampion-lib"
 version = "0.1.0"
 edition = "2021"
 publish = false
-rust-version = "1.78.0"  # MSRV
+rust-version = "1.81.0"  # MSRV
 
 [lib]
 crate-type = ["staticlib"]
 
 [dependencies]
-taskchampion = "=1.0.2"
+taskchampion = "=2.0.2"
 cxx = "1.0.133"
 
 [features]

src/taskchampion-cpp/src/lib.rs

@@ -494,6 +494,7 @@ fn new_replica_on_disk(
     let storage = tc::StorageConfig::OnDisk {
         taskdb_dir: PathBuf::from(taskdb_dir),
         create_if_missing,
+        access_mode: tc::storage::AccessMode::ReadWrite,
     }
     .into_storage()?;
     Ok(Box::new(tc::Replica::new(storage).into()))