flake.lock: Update (#1554)

Flake lock file updates:

• Updated input 'crate2nix':
    'github:kolloch/crate2nix/805cdaf084c859c2ea0c084b74f4527b0483f6aa' (2022-06-17)
  → 'github:kolloch/crate2nix/91f333aca414ee346bc5bdea76fe9938f73a15f9' (2022-07-01)
• Updated input 'flake-utils':
    'github:numtide/flake-utils/1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1' (2022-05-30)
  → 'github:numtide/flake-utils/bee6a7250dd1b01844a2de7e02e4df7d8a0a206c' (2022-06-24)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/3d7435c638baffaa826b85459df0fff47f12317d' (2022-06-16)
  → 'github:nixos/nixpkgs/0ea7a8f1b939d74e5df8af9a8f7342097cdf69eb' (2022-07-02)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/da04f39d50ad2844e97a44015048c2510ca06c2f' (2022-06-18)
  → 'github:oxalica/rust-overlay/bbba5e73a21c8c67d5fe1d4d8b3fde60ab6946cd' (2022-07-03)

flake.lock

@@ -3,11 +3,11 @@
     "crate2nix": {
       "flake": false,
       "locked": {
-        "lastModified": 1655453176,
-        "narHash": "sha256-3Dr1vCEwl3/4smRLm3OqiJ3ZJybEAfUlzdHLnTLFPDs=",
+        "lastModified": 1656671959,
+        "narHash": "sha256-7GPPgq665fm2k/aXca9P25huieEq7lu4jAwItiZlYFs=",
         "owner": "kolloch",
         "repo": "crate2nix",
-        "rev": "805cdaf084c859c2ea0c084b74f4527b0483f6aa",
+        "rev": "91f333aca414ee346bc5bdea76fe9938f73a15f9",
         "type": "github"
       },
       "original": {
@@ -34,11 +34,11 @@
     },
     "flake-utils": {
       "locked": {
-        "lastModified": 1653893745,
-        "narHash": "sha256-0jntwV3Z8//YwuOjzhV2sgJJPt+HY6KhU7VZUL0fKZQ=",
+        "lastModified": 1656065134,
+        "narHash": "sha256-oc6E6ByIw3oJaIyc67maaFcnjYOz1mMcOtHxbEf9NwQ=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "1ed9fb1935d260de5fe1c2f7ee0ebaae17ed2fa1",
+        "rev": "bee6a7250dd1b01844a2de7e02e4df7d8a0a206c",
         "type": "github"
       },
       "original": {
@@ -49,11 +49,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1655400192,
-        "narHash": "sha256-49OBVVRgb9H/PSmNT9W61+NRdDbuSJVuDDflwXlaUKU=",
+        "lastModified": 1656753965,
+        "narHash": "sha256-BCrB3l0qpJokOnIVc3g2lHiGhnjUi0MoXiw6t1o8H1E=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3d7435c638baffaa826b85459df0fff47f12317d",
+        "rev": "0ea7a8f1b939d74e5df8af9a8f7342097cdf69eb",
         "type": "github"
       },
       "original": {
@@ -82,11 +82,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1655520266,
-        "narHash": "sha256-YEo20XNDKwFSMzg4wGDz/uxNmd/FleUPgVkFyWx3UWA=",
+        "lastModified": 1656816597,
+        "narHash": "sha256-Y3f7wOZIvgr5IGW0u3d8stemjQPPRs4n93DjKJbrvXs=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "da04f39d50ad2844e97a44015048c2510ca06c2f",
+        "rev": "bbba5e73a21c8c67d5fe1d4d8b3fde60ab6946cd",
         "type": "github"
       },
       "original": {