Update dotnet tools

dotnet-validate@0.0.1-preview.582
dotnet-stryker@4.15.0

Author: 0xced

.config/dotnet-tools.json

@@ -3,14 +3,14 @@
   "isRoot": true,
   "tools": {
     "dotnet-validate": {
-      "version": "0.0.1-preview.537",
+      "version": "0.0.1-preview.582",
       "commands": [
         "dotnet-validate"
       ],
       "rollForward": true
     },
     "dotnet-stryker": {
-      "version": "4.14.1",
+      "version": "4.15.0",
       "commands": [
         "dotnet-stryker"
       ],