Update copyright year of projects to 2019

Author: YevgeniyShunevych

src/Atata.Configuration.Json/Atata.Configuration.Json.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net40;net45;netstandard2.0</TargetFrameworks>
@@ -19,7 +19,7 @@ Features:
 - Multi-driver configuration
 - Merged configuration via multiple files
 - Multiple environments support</Description>
-    <Copyright>© Yevgeniy Shunevych 2018</Copyright>
+    <Copyright>© Yevgeniy Shunevych 2019</Copyright>
     <PackageLicenseUrl>https://raw.githubusercontent.com/atata-framework/atata-configuration-json/master/LICENSE</PackageLicenseUrl>
     <PackageProjectUrl>https://github.com/atata-framework/atata-configuration-json</PackageProjectUrl>
     <PackageIconUrl>https://raw.githubusercontent.com/atata-framework/atata/master/logo_68.png</PackageIconUrl>

src/CommonAssemblyInfo.cs

@@ -3,7 +3,7 @@
 
 [assembly: AssemblyCompany("Yevgeniy Shunevych")]
 [assembly: AssemblyProduct("Atata Framework")]
-[assembly: AssemblyCopyright("© Yevgeniy Shunevych 2018")]
+[assembly: AssemblyCopyright("© Yevgeniy Shunevych 2019")]
 [assembly: AssemblyCulture("")]
 [assembly: ComVisible(false)]
 [assembly: AssemblyVersion("1.0.0")]