niv candid: update 331217ba -> a1eb218c

## Changelog for candid:
Branch: master
Commits: [dfinity/candid@331217ba...a1eb218c](dfinity/candid@331217b...a1eb218)

* [`a71eb20a`](dfinity/candid@a71eb20) limit size of vec null/reserved ([dfinity/candid⁠#434](https://togithub.com/dfinity/candid/issues/434))
* [`de8b57a0`](dfinity/candid@de8b57a) [Rust] Add composite_query ([dfinity/candid⁠#435](https://togithub.com/dfinity/candid/issues/435))
* [`e212e096`](dfinity/candid@e212e09) add play.motoko.org to Candid UI ([dfinity/candid⁠#437](https://togithub.com/dfinity/candid/issues/437))
* [`c9c85d0a`](dfinity/candid@c9c85d0) bump dependencies for candid UI ([dfinity/candid⁠#442](https://togithub.com/dfinity/candid/issues/442))
* [`e73a8c9f`](dfinity/candid@e73a8c9) fix spec for optional terminal semicolons ([dfinity/candid⁠#445](https://togithub.com/dfinity/candid/issues/445))
* [`f1d573cb`](dfinity/candid@f1d573c) sort define_service ([dfinity/candid⁠#441](https://togithub.com/dfinity/candid/issues/441))
* [`6961355c`](dfinity/candid@6961355) [Rust] add quote for reserved field names in debug trait ([dfinity/candid⁠#446](https://togithub.com/dfinity/candid/issues/446))
* [`e660ff02`](dfinity/candid@e660ff0) use const generics for array ([dfinity/candid⁠#444](https://togithub.com/dfinity/candid/issues/444))
* [`199fd05b`](dfinity/candid@199fd05) release candid 0.9 ([dfinity/candid⁠#447](https://togithub.com/dfinity/candid/issues/447))
* [`7caa48ab`](dfinity/candid@7caa48a) [C++] Add link to icpp-candid ([dfinity/candid⁠#450](https://togithub.com/dfinity/candid/issues/450))
* [`c2a310f8`](dfinity/candid@c2a310f) [Rust] adding more util functions ([dfinity/candid⁠#451](https://togithub.com/dfinity/candid/issues/451))
* [`528a3438`](dfinity/candid@528a343) bump Candid UI ([dfinity/candid⁠#449](https://togithub.com/dfinity/candid/issues/449))
* [`5066e27c`](dfinity/candid@5066e27) update to syn 2 and release ([dfinity/candid⁠#452](https://togithub.com/dfinity/candid/issues/452))
* [`581303ec`](dfinity/candid@581303e) fix composite query for candid UI ([dfinity/candid⁠#453](https://togithub.com/dfinity/candid/issues/453))
* [`457b5beb`](dfinity/candid@457b5be) recover subtype error from custom deserializer ([dfinity/candid⁠#456](https://togithub.com/dfinity/candid/issues/456))
* [`9524eae1`](dfinity/candid@9524eae) fix equality check ([dfinity/candid⁠#455](https://togithub.com/dfinity/candid/issues/455))
* [`6188ebbf`](dfinity/candid@6188ebb) release ([dfinity/candid⁠#457](https://togithub.com/dfinity/candid/issues/457))
* [`2c3f8a38`](dfinity/candid@2c3f8a3) move away from BigInt::try_into ([dfinity/candid⁠#458](https://togithub.com/dfinity/candid/issues/458))
* [`9f567c32`](dfinity/candid@9f567c3) spec: allow record {} <: record {null} ([dfinity/candid⁠#462](https://togithub.com/dfinity/candid/issues/462))
* [`7273592a`](dfinity/candid@7273592) Fix length counting of zero sized values ([dfinity/candid⁠#460](https://togithub.com/dfinity/candid/issues/460))
* [`1c383a7e`](dfinity/candid@1c383a7) remove arc_type feature ([dfinity/candid⁠#463](https://togithub.com/dfinity/candid/issues/463))
* [`b7755ea7`](dfinity/candid@b7755ea) bump candid ui ([dfinity/candid⁠#464](https://togithub.com/dfinity/candid/issues/464))
* [`c862f838`](dfinity/candid@c862f83) make the field zero_sized_values in candid::de::Config public ([dfinity/candid⁠#465](https://togithub.com/dfinity/candid/issues/465))
* [`dbee8786`](dfinity/candid@dbee878) More work for Rust binding ([dfinity/candid⁠#461](https://togithub.com/dfinity/candid/issues/461))
* [`a1eb218c`](dfinity/candid@a1eb218) Misc ([dfinity/candid⁠#466](https://togithub.com/dfinity/candid/issues/466))

nix/sources.json

@@ -6,10 +6,10 @@
         "homepage": "",
         "owner": "dfinity",
         "repo": "candid",
-        "rev": "331217bae379cbebfa531a140f2186c99fae1425",
-        "sha256": "095w2a4lxy2gd7vfjxn7jszm4x3srw8xlxb1zzd096y6h047rxlj",
+        "rev": "a1eb218c4777d7a1be263f061d499dfc428136a2",
+        "sha256": "17l1466zxqxsz0ak082rlwk728ignvnhpbms88kxz19scffrks2r",
         "type": "tarball",
-        "url": "https://github.com/dfinity/candid/archive/331217bae379cbebfa531a140f2186c99fae1425.tar.gz",
+        "url": "https://github.com/dfinity/candid/archive/a1eb218c4777d7a1be263f061d499dfc428136a2.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "esm": {