Align Web Crypto support with caniuse (#3268)

This started out as an attempt to align the support with the
description, and pinning to encrypt/decrypt/sign/verify gets us very
close to what caniuse claims.

If we had the ability to selectively ignore notes from BCD, we would use
that mechanism here.

Author: foolip

features/web-cryptography.yml

@@ -5,8 +5,22 @@ spec:
   - https://wicg.github.io/webcrypto-secure-curves/
 caniuse: cryptography
 group: security
+# Override the status to match caniuse. This is the same as one would get by
+# computing the status from api.SubtleCrypto.encrypt/decrypt/sign/verify, except
+# for Edge 12-18 where BCD has partial_implementation due to some unsupported
+# algorithms. However, the supported algorithms have changed over time, so it
+# seems more fair to treat it as supported in Edge 12-18.
 status:
-  compute_from: api.Crypto
+  baseline: high
+  baseline_low_date: 2015-07-29
+  support:
+    chrome: "37"
+    chrome_android: "37"
+    edge: "12"
+    firefox: "34"
+    firefox_android: "34"
+    safari: "11"
+    safari_ios: "11"
 compat_features:
   - api.Crypto
   - api.Crypto.getRandomValues

features/web-cryptography.yml.dist

@@ -1,20 +1,7 @@
 # Generated from: web-cryptography.yml
 # Do not edit this file by hand. Edit the source file instead!
 
-status:
-  baseline: high
-  baseline_low_date: 2015-07-29
-  baseline_high_date: 2018-01-29
-  support:
-    chrome: "11"
-    chrome_android: "18"
-    edge: "12"
-    firefox: "21"
-    firefox_android: "21"
-    safari: "5"
-    safari_ios: "5"
 compat_features:
-  # ⬇️ Same status as overall feature ⬇️
   # baseline: high
   # baseline_low_date: 2015-07-29
   # baseline_high_date: 2018-01-29