fix(deltachat-rpc-server): update tokio-tar to fix backup import

tokio-tar 0.3.0 prints message "create_dir_all ..." to stdout during import.
tokio-tar 0.3.1 has removed this debug output which broke stdio JSON-RPC protocol.

Cargo.lock

@@ -4958,14 +4958,14 @@ dependencies = [
 
 [[package]]
 name = "tokio-tar"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a50188549787c32c1c3d9c8c71ad7e003ccf2f102489c5a96e385c84760477f4"
+checksum = "9d5714c010ca3e5c27114c1cdeb9d14641ace49874aa5626d7149e47aedace75"
 dependencies = [
  "filetime",
  "futures-core",
  "libc",
- "redox_syscall 0.2.16",
+ "redox_syscall 0.3.5",
  "tokio",
  "tokio-stream",
  "xattr",
@@ -5778,9 +5778,9 @@ dependencies = [
 
 [[package]]
 name = "xattr"
-version = "0.2.3"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d1526bbe5aaeb5eb06885f4d987bcdfa5e23187055de9b83fe00156a821fabc"
+checksum = "ea263437ca03c1522846a4ddafbca2542d0ad5ed9b784909d4b27b76f62bc34a"
 dependencies = [
  "libc",
 ]