Don't throw when config section is not present (#31)

* Fix bug

* Update flow

Author: Tim-Maes

src/Bindicate/Bindicate.csproj

@@ -13,7 +13,7 @@
     <PackageTags>di, ioc, service, collection, extensions, attribute</PackageTags>
     <PackageReleaseNotes>Add support for Decorators</PackageReleaseNotes>
     <PackageLicenseFile>LICENSE.txt</PackageLicenseFile>
-    <Version>1.7.0</Version>
+    <Version>1.7.1</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/Bindicate/Configuration/AutowiringBuilder.cs

@@ -136,15 +136,15 @@ public AutowiringBuilder WithOptions(IConfiguration configuration)
                 {
                     var configSection = configuration.GetSection(attr.ConfigurationSection);
 
-                    if (!configSection.Exists())
-                        throw new InvalidOperationException($"Missing configuration section: {attr.ConfigurationSection}");
-
-                    var genericOptionsConfigureMethod = typeof(OptionsConfigurationServiceCollectionExtensions)
-                            .GetMethods()
-                            .FirstOrDefault(m => m.Name == "Configure" && m.GetParameters().Length == 2);
+                    if (configSection.Exists())
+                    {
+                        var genericOptionsConfigureMethod = typeof(OptionsConfigurationServiceCollectionExtensions)
+                                .GetMethods()
+                                .FirstOrDefault(m => m.Name == "Configure" && m.GetParameters().Length == 2);
 
-                    var specializedMethod = genericOptionsConfigureMethod.MakeGenericMethod(type);
-                    specializedMethod.Invoke(null, new object[] { _services, configSection });
+                        var specializedMethod = genericOptionsConfigureMethod.MakeGenericMethod(type);
+                        specializedMethod.Invoke(null, new object[] { _services, configSection });
+                    }
                 }
             }
         }