Add Uint8Array to/from base64 and hex (#2155)

Co-authored-by: Daniel D. Beck <daniel@ddbeck.com>

Author: Elchi3

features/uint8array-base64-hex.yml

@@ -0,0 +1,12 @@
+name: Uint8Array base64 and hex conversion
+description: The `Uint8Array` object methods `fromBase64()`, `toBase64()`, and `setFromBase64()` convert to and from base64 strings. The `fromHex()`, `toHex()`, and `setFromHex()` methods convert to and from hex strings.
+spec: https://tc39.es/proposal-arraybuffer-base64/spec/
+group:
+  - typed-arrays
+compat_features:
+  - javascript.builtins.Uint8Array.fromBase64
+  - javascript.builtins.Uint8Array.fromHex
+  - javascript.builtins.Uint8Array.setFromBase64
+  - javascript.builtins.Uint8Array.setFromHex
+  - javascript.builtins.Uint8Array.toBase64
+  - javascript.builtins.Uint8Array.toHex

features/uint8array-base64-hex.yml.dist

@@ -0,0 +1,13 @@
+# Generated from: uint8array-base64-hex.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support: {}
+compat_features:
+  - javascript.builtins.Uint8Array.fromBase64
+  - javascript.builtins.Uint8Array.fromHex
+  - javascript.builtins.Uint8Array.setFromBase64
+  - javascript.builtins.Uint8Array.setFromHex
+  - javascript.builtins.Uint8Array.toBase64
+  - javascript.builtins.Uint8Array.toHex