Update features.txt status (#2022)

Move proposals that have been incorporated into the standard to the
corresponding section.

features.txt

@@ -34,45 +34,6 @@ class-methods-private
 # https://github.com/tc39/proposal-dynamic-import
 dynamic-import
 
-# Promise.prototype.finally
-# https://github.com/tc39/proposal-promise-finally
-Promise.prototype.finally
-
-# Async Iteration and Generators
-# https://github.com/tc39/proposal-async-iteration
-async-iteration
-Symbol.asyncIterator
-
-# Object rest/spread properties
-# https://github.com/tc39/proposal-object-rest-spread
-object-rest
-object-spread
-
-# Optional Catch Binding
-# https://github.com/tc39/proposal-optional-catch-binding
-optional-catch-binding
-
-# RegExp s (dotAll) flag
-# https://github.com/tc39/proposal-regexp-dotall-flag
-regexp-dotall
-
-# RegExp lookBehind
-# https://github.com/tc39/proposal-regexp-lookbehind
-regexp-lookbehind
-
-# RegExp named groups capturing
-# https://github.com/tc39/proposal-regexp-named-groups
-regexp-named-groups
-
-# RegExp Unicode Property Escapes
-# https://github.com/tc39/proposal-regexp-unicode-property-escapes
-regexp-unicode-property-escapes
-
-# Shared Memory and Atomics
-# https://github.com/tc39/ecmascript_sharedmem
-Atomics
-SharedArrayBuffer
-
 # Array.prototype.flat and Array.prototype.flatMap
 # https://github.com/tc39/proposal-flatMap
 Array.prototype.flat
@@ -99,10 +60,6 @@ Symbol.matchAll
 # https://github.com/tc39/proposal-symbol-description
 Symbol.prototype.description
 
-# ECMAScript ⊃ JSON
-# https://github.com/tc39/proposal-json-superset
-json-superset
-
 # Well-formed JSON.stringify
 # https://github.com/tc39/proposal-well-formed-stringify
 well-formed-json-stringify
@@ -149,7 +106,9 @@ import.meta
 ArrayBuffer
 Array.prototype.values
 arrow-function
+async-iteration
 async-functions
+Atomics
 caller
 class
 computed-property-names
@@ -173,21 +132,32 @@ Float64Array
 generators
 Int8Array
 Int32Array
+json-superset
 let
 Map
 new.target
+object-rest
+object-spread
 Object.is
+optional-catch-binding
+Promise.prototype.finally
 Proxy
 Reflect
 Reflect.construct
 Reflect.set
 Reflect.setPrototypeOf
+regexp-dotall
+regexp-lookbehind
+regexp-named-groups
+regexp-unicode-property-escapes
 Set
+SharedArrayBuffer
 String.fromCodePoint
 String.prototype.endsWith
 String.prototype.includes
 super
 Symbol
+Symbol.asyncIterator
 Symbol.hasInstance
 Symbol.isConcatSpreadable
 Symbol.iterator