Update README and template.json files

Author: AndreyAkinshin

README.md

@@ -30,7 +30,7 @@ It's no harder than writing unit tests!
 Under the hood, it performs a lot of [magic](#automation) that guarantees [reliable and precise](#reliability) results thanks to the [perfolizer](https://github.com/AndreyAkinshin/perfolizer) statistical engine.
 BenchmarkDotNet protects you from popular benchmarking mistakes and warns you if something is wrong with your benchmark design or obtained measurements.
 The results are presented in a [user-friendly](#friendliness) form that highlights all the important facts about your experiment.
-BenchmarkDotNet is already adopted by [25800+ GitHub projects](https://github.com/dotnet/BenchmarkDotNet/network/dependents) including
+BenchmarkDotNet is already adopted by [26000+ GitHub projects](https://github.com/dotnet/BenchmarkDotNet/network/dependents) including
   [.NET Runtime](https://github.com/dotnet/runtime),
   [.NET Compiler](https://github.com/dotnet/roslyn),
   [.NET Performance](https://github.com/dotnet/performance),

templates/templates/BenchmarkDotNet.BenchmarkProjectTemplate.CSharp/.template.config/template.json

@@ -139,7 +139,7 @@
       "type": "parameter",
       "datatype": "string",
       "description": "Version of BenchmarkDotNet that will be referenced.",
-      "defaultValue": "0.14.1",
+      "defaultValue": "0.15.0",
       "replaces": "$(BenchmarkDotNetVersion)"
     }
   },
@@ -184,4 +184,4 @@
       "continueOnError": true
     }
   ]
-}
+}

templates/templates/BenchmarkDotNet.BenchmarkProjectTemplate.FSharp/.template.config/template.json

@@ -139,7 +139,7 @@
       "type": "parameter",
       "datatype": "string",
       "description": "Version of BenchmarkDotNet that will be referenced.",
-      "defaultValue": "0.14.1",
+      "defaultValue": "0.15.0",
       "replaces": "$(BenchmarkDotNetVersion)"
     }
   },
@@ -184,4 +184,4 @@
       "continueOnError": true
     }
   ]
-}
+}

templates/templates/BenchmarkDotNet.BenchmarkProjectTemplate.VB/.template.config/template.json

@@ -139,7 +139,7 @@
       "type": "parameter",
       "datatype": "string",
       "description": "Version of BenchmarkDotNet that will be referenced.",
-      "defaultValue": "0.14.1",
+      "defaultValue": "0.15.0",
       "replaces": "$(BenchmarkDotNetVersion)"
     }
   },
@@ -184,4 +184,4 @@
       "continueOnError": true
     }
   ]
-}
+}