Update v7-feature-tracker.md (#379)

Author: RexJaeschke

admin/v7-feature-tracker.md

@@ -4,34 +4,34 @@ This file identifies the known V7 features and tracks their status. Although the
 
 Version | Feature | PR | Status | Notes
 ------- | ------- | -- | ------ | ------
-7.0 | binary integer literals | [45](https://github.com/dotnet/csharpstandard/pull/45) | Open | Combination #1
-7.0 | embedded digit separators in numeric literals | [45](https://github.com/dotnet/csharpstandard/pull/45) | Open |  Combination #1
-7.0 | `out` variables | [44](https://github.com/dotnet/csharpstandard/pull/44) | Open |  Combination #2
-7.0 | Discards | [44](https://github.com/dotnet/csharpstandard/pull/44) | Open |  Combination #2
-7.0 | Tuples | [63](https://github.com/dotnet/csharpstandard/pull/63) **but needs some work** | Open |  Combination #3
-7.0 | Pattern Matching | [61](https://github.com/dotnet/csharpstandard/pull/61) | Open |  Combination #3
-7.0 | `ref` locals and returns | [213](https://github.com/dotnet/csharpstandard/pull/213) | Open | Combination #4
-7.0 | Local Functions | [104](https://github.com/dotnet/csharpstandard/pull/104) | Open | 
-7.0 | More expression-bodied members | [69](https://github.com/dotnet/csharpstandard/pull/69) | Open |  
-7.0 | `throw` Expressions | [65](https://github.com/dotnet/csharpstandard/pull/65) **but needs some work** | Open |  
-7.0 | Generalized `async` return types | **needs some work**, see Issue [345](https://github.com/dotnet/csharpstandard/issues/345) | Open | 
-7.1 | `async Main` method | [70](https://github.com/dotnet/csharpstandard/pull/70) | Open |  
-7.1 | `default` literal expressions | [236](https://github.com/dotnet/csharpstandard/pull/236) | Open |  
-7.1 | Inferred tuple element names | [63](https://github.com/dotnet/csharpstandard/pull/63) **but needs some work** | Open | 
-7.1 | Pattern matching on generic type parameters | [61](https://github.com/dotnet/csharpstandard/pull/61) | Open |  Combination #3
-7.2 | leading digit separators in bin/hex integer literals | [45](https://github.com/dotnet/csharpstandard/pull/45) | Open |  Combination #1
-7.2 | Non-trailing named arguments | [216](https://github.com/dotnet/csharpstandard/pull/216) | Open | | 
-7.2 | `private protected` access modifier | [215](https://github.com/dotnet/csharpstandard/pull/215) | Open | 
-7.2 | Conditional `ref` expressions | [213](https://github.com/dotnet/csharpstandard/pull/213) | Open | Combination #4
-7.2 | `in` parameter modifier | [219](https://github.com/dotnet/csharpstandard/pull/219) | Open | Combination #5
-7.2 | `ref` with `this` in extension methods | [219](https://github.com/dotnet/csharpstandard/pull/219) | Open | Combination #5
-7.2 | `readonly` and `ref` structs | [333](https://github.com/dotnet/csharpstandard/pull/333) **but needs some work** | Open | 
-7.3 | indexing movable fixed buffer without pinning | [239](https://github.com/dotnet/csharpstandard/pull/239) | Open |  
-7.3 | reassign `ref` local variables | [213](https://github.com/dotnet/csharpstandard/pull/213) | Open | Combination #4
-7.3 | use initializers on `stackalloc` arrays | [238](https://github.com/dotnet/csharpstandard/pull/238) | Open |  
-7.3 | Support for Pattern-Based `fixed` Statements | [240](https://github.com/dotnet/csharpstandard/pull/240) | Open |  
-7.3 | use additional generic constraints | [244](https://github.com/dotnet/csharpstandard/pull/244) | Open |  
-7.3 | test `==` and `!=` with tuple types | [63](https://github.com/dotnet/csharpstandard/pull/63) **but needs some work** | Open |  Combination #3
-7.3 | use expression variables in more locations | [44](https://github.com/dotnet/csharpstandard/pull/44), [61](https://github.com/dotnet/csharpstandard/pull/61) | Open | Combination #2 & #3
-7.3 | attach attributes to the backing field of auto-implemented properties | [262](https://github.com/dotnet/csharpstandard/pull/262) | Open |  
-7.3 | overload resolution now has fewer ambiguous cases | [263](https://github.com/dotnet/csharpstandard/pull/263) | Open |  
+7.0 | binary integer literals | [45](https://github.com/dotnet/csharpstandard/pull/45) | Needs review | Combination #1
+7.0 | embedded digit separators in numeric literals | [45](https://github.com/dotnet/csharpstandard/pull/45) | Needs review |  Combination #1
+7.0 | `out` variables | [44](https://github.com/dotnet/csharpstandard/pull/44) | Needs review |  Combination #2
+7.0 | Discards | [44](https://github.com/dotnet/csharpstandard/pull/44) | Needs review |  Combination #2
+7.0 | Tuples | [63](https://github.com/dotnet/csharpstandard/pull/63) | See Issue [64](https://github.com/dotnet/csharpstandard/issues/64) |  Combination #3
+7.0 | Pattern Matching | [61](https://github.com/dotnet/csharpstandard/pull/61) | Needs review |  Combination #3
+7.0 | `ref` locals and returns | [213](https://github.com/dotnet/csharpstandard/pull/213) | Needs review | Combination #4
+7.0 | Local Functions | [104](https://github.com/dotnet/csharpstandard/pull/104) | Needs review | 
+7.0 | More expression-bodied members | [69](https://github.com/dotnet/csharpstandard/pull/69) | Needs review |  
+7.0 | `throw` Expressions | [65](https://github.com/dotnet/csharpstandard/pull/65) | See Issue [66](https://github.com/dotnet/csharpstandard/issues/66) |  
+7.0 | Generalized `async` return types | Open | See Issue [345](https://github.com/dotnet/csharpstandard/issues/345) | 
+7.1 | `async Main` method | [70](https://github.com/dotnet/csharpstandard/pull/70) | Needs review |  
+7.1 | `default` literal expressions | [236](https://github.com/dotnet/csharpstandard/pull/236) | Needs review |  
+7.1 | Inferred tuple element names | [63](https://github.com/dotnet/csharpstandard/pull/63) | See Issue [64](https://github.com/dotnet/csharpstandard/issues/64) | 
+7.1 | Pattern matching on generic type parameters | [61](https://github.com/dotnet/csharpstandard/pull/61) | Needs review |  Combination #3
+7.2 | leading digit separators in bin/hex integer literals | [45](https://github.com/dotnet/csharpstandard/pull/45) | Needs review |  Combination #1
+7.2 | Non-trailing named arguments | [216](https://github.com/dotnet/csharpstandard/pull/216) | Needs review |
+7.2 | `private protected` access modifier | [215](https://github.com/dotnet/csharpstandard/pull/215) | Needs review | 
+7.2 | Conditional `ref` expressions | [213](https://github.com/dotnet/csharpstandard/pull/213) | Needs review | Combination #4
+7.2 | `in` parameter modifier | [219](https://github.com/dotnet/csharpstandard/pull/219) | Needs review | Combination #5
+7.2 | `ref` with `this` in extension methods | [219](https://github.com/dotnet/csharpstandard/pull/219) | Needs review | Combination #5
+7.2 | `readonly` and `ref` structs | [333](https://github.com/dotnet/csharpstandard/pull/333) | See Issue [334](https://github.com/dotnet/csharpstandard/issues/334) | 
+7.3 | indexing movable fixed buffer without pinning | [239](https://github.com/dotnet/csharpstandard/pull/239) | Needs review |  
+7.3 | reassign `ref` local variables | [213](https://github.com/dotnet/csharpstandard/pull/213) | Needs review | Combination #4
+7.3 | use initializers on `stackalloc` arrays | [238](https://github.com/dotnet/csharpstandard/pull/238) | Needs review |  
+7.3 | Support for Pattern-Based `fixed` Statements | [240](https://github.com/dotnet/csharpstandard/pull/240) | See Issue [241](https://github.com/dotnet/csharpstandard/issues/241) |  
+7.3 | use additional generic constraints | [244](https://github.com/dotnet/csharpstandard/pull/244) | Needs review |  
+7.3 | test `==` and `!=` with tuple types | [63](https://github.com/dotnet/csharpstandard/pull/63) | See Issue [64](https://github.com/dotnet/csharpstandard/issues/64) |  Combination #3
+7.3 | use expression variables in more locations | [44](https://github.com/dotnet/csharpstandard/pull/44), [61](https://github.com/dotnet/csharpstandard/pull/61) | Needs review | Combination #2 & #3
+7.3 | attach attributes to the backing field of auto-implemented properties | [262](https://github.com/dotnet/csharpstandard/pull/262) | Needs review |  
+7.3 | overload resolution now has fewer ambiguous cases | [263](https://github.com/dotnet/csharpstandard/pull/263) | Needs review |