csproj, exclude net45 for non Windows_NT

Author: phnx47

src/Unidecode.NET.csproj

@@ -7,9 +7,14 @@
     <Copyright>2018 © Dima Stefantsov, Vitalii Ganzha, Sergey Kuznetsov</Copyright>
     <PackageLicenseUrl>https://opensource.org/licenses/MIT</PackageLicenseUrl>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
-    <Description>It provides string or char extension method Unidecode() that returns transliterated string. It supports huge amount of languages. And it's very easy to add your language if it's not supported already!</Description>
-    <TargetFrameworks>netstandard1.2;netstandard2.0;net45</TargetFrameworks>
-    <VersionPrefix>1.2.0</VersionPrefix>
+    <Description>
+      It provides string or char extension method Unidecode() that returns transliterated string. 
+      It supports huge amount of languages.
+      And it's very easy to add your language if it's not supported already!
+    </Description>
+    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">netstandard1.2;netstandard2.0;net45</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netstandard1.2;netstandard2.0</TargetFrameworks>
+    <VersionPrefix>1.3.0</VersionPrefix>
     <PackageTags>text;unicode;seo</PackageTags>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/thecoderok/Unidecode.NET</PackageProjectUrl>