Add review for slug v0.1.4

YdnEoYtqvbBGv0hhENLDUYmc3tNfm5V5NIG5hCovHyM/reviews/2021-02-package-WXpLsg.proof.crev

@@ -0,0 +1,34 @@
+----- BEGIN CREV PROOF -----
+kind: package review
+version: -1
+date: "2021-02-15T21:29:13.505132766+01:00"
+from:
+  id-type: crev
+  id: YdnEoYtqvbBGv0hhENLDUYmc3tNfm5V5NIG5hCovHyM
+  url: "https://git.jcg.re/jcgruenhage/crev-proofs.git"
+package:
+  source: "https://crates.io"
+  name: slug
+  version: 0.1.4
+  revision: 1436a3b1f9362cb413bcee9ff86ef20840ed0916
+  digest: Q4CWSCF1ik0ZXxI7AWtVj-SFN1gwJPpheP1PRThK_xA
+review:
+  thoroughness: high
+  understanding: high
+  rating: positive
+alternatives:
+  - source: "https://crates.io"
+    name: str_slug
+comment: |-
+  Short and concise implementation. A little code that's technically unsafe, for
+  lowercasing ASCII, as Rust's `to_lowercase()` impl is slower because it's
+  unicode aware. As it doesn't have to handle unicode where it's used, it is
+  still sound.
+  
+  Aside of it's own code, there is unsafe in the deps too: If `deunicode` is
+  fine, then this is too. I didn't invest enough time in `deunicode` to make a
+  final judgement about it, but others have so it's probably okay.
+----- SIGN CREV PROOF -----
+5eqM8gp_WBP44B3azUOT7_yDeJHEnKamgNHQenmiC51OWcjm0OW5wl5u7mlABoDg1qzNTawjCIyiJ5abdM_lCA
+----- END CREV PROOF -----
+