Target minimal TFMs

Author: pranavkm

src/Microsoft.Net.Http.Headers/ContentDispositionHeaderValue.cs

@@ -511,7 +511,7 @@ private bool TryDecodeMime(string input, out string output)
             {
                 var encoding = Encoding.GetEncoding(parts[1]);
                 var bytes = Convert.FromBase64String(parts[3]);
-                output = encoding.GetString(bytes);
+                output = encoding.GetString(bytes, 0, bytes.Length);
                 return true;
             }
             catch (ArgumentException)

src/Microsoft.Net.Http.Headers/HttpRuleParser.cs

@@ -41,7 +41,7 @@ internal static class HttpRuleParser
         internal const int MaxInt32Digits = 10;
 
         // iso-8859-1, Western European (ISO)
-        internal static readonly Encoding DefaultHttpEncoding = Encoding.GetEncoding(28591);
+        internal static readonly Encoding DefaultHttpEncoding = Encoding.GetEncoding("iso-8859-1");
 
         static HttpRuleParser()
         {

src/Microsoft.Net.Http.Headers/project.json

@@ -15,19 +15,18 @@
   },
   "dependencies": {},
   "frameworks": {
-    "net451": {},
-    "netstandard1.3": {
+    "netstandard1.0": {
       "dependencies": {
         "System.Collections": "4.0.11-*",
         "System.Diagnostics.Contracts": "4.0.1-*",
         "System.Globalization": "4.0.11-*",
-        "System.Globalization.Extensions": "4.0.1-*",
         "System.Linq": "4.1.0-*",
+        "System.Resources.ResourceManager": "4.0.1-*",
+        "System.Runtime.Extensions": "4.1.0-*",
         "System.Text.Encoding": "4.0.11-*",
-        "System.Resources.ResourceManager": "4.0.1-*"
       },
       "imports": [
-        "dotnet5.4"
+        "dotnet5.1"
       ]
     }
   }