Removed reference to .NET 8 for now awaiting new build on appveyor. Set CurrentCell and CurrentWorksheet on ParsingContext to public

Author: JanKallman

src/EPPlus/EPPlus.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net7.0;net6.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
+    <TargetFrameworks>net7.0;net6.0;netstandard2.1;netstandard2.0;net462;net35</TargetFrameworks>
     <AssemblyVersion>7.0.1.0</AssemblyVersion>
     <FileVersion>7.0.1.0</FileVersion>
     <Version>7.0.1</Version>

src/EPPlus/FormulaParsing/ParsingContext.cs

@@ -145,17 +145,14 @@ internal ExcelExternalWorkbook GetExternalWoorkbook(int externalReferenceIx)
         }
 
         internal HashSet<ulong> SubtotalAddresses { get; private set; }
-        internal FormulaCellAddress CurrentCell { get; set; }
-        internal FormulaCellAddress CurrentName { get; set; }
-        internal string CurrentCellFullAddress 
-        { 
-            get
-            {
-                var ws = CurrentCell.WorksheetIx < 0 || CurrentCell.WorksheetIx>=Package.Workbook.Worksheets.Count ? "" : Package.Workbook.Worksheets[CurrentCell.WorksheetIx].Name+"!";
-                return ws + CurrentCell.Address;
-            }
-        }
-        internal ExcelWorksheet CurrentWorksheet 
+        /// <summary>
+        /// Represents the current cell 
+        /// </summary>
+        public FormulaCellAddress CurrentCell { get; set; }
+        /// <summary>
+        /// The worksheet where the current formula is located.
+        /// </summary>
+        public ExcelWorksheet CurrentWorksheet 
         { 
             get
             {