Prepared a release that (hopefully) makes MinGW work again

Author: gunterkoenigsmann

CMakeLists.txt

@@ -22,7 +22,7 @@ else()
 endif()
 
 project(wxmaxima LANGUAGES CXX)
-set(VERSION 20.06.4)
+set(VERSION 20.06.5)
 set(GITVERSION ${VERSION})
 set(PACKAGE wxmaxima)
 set(APP_NAME wxmaxima)

NEWS.md

@@ -1,3 +1,7 @@
+#20.06.5
+ * wxMaxima now ships around a pecularity in MinGW 
+ * wxMaxima now ships around a MinGW-specific bug in catch2
+
 #20.06.4
  * wxMaxima now automatically recovers truncated .wxmx files
  * Resolved an compile error with the crosscompiled Windows build

data/io.github.wxmaxima_developers.wxMaxima.appdata.xml

@@ -51,10 +51,23 @@
     <content_attribute id="social-info">mild</content_attribute>
   </content_rating>
   <releases>
+
     <!-- prefer to use date with approximate UTC time - this way the verifier won't trip due
          to time zone variations 
          You can see current time at: https://en.wikipedia.org/wiki/ISO_8601
     -->
+    <release version="20.06.5" date="2020-06-07T10:07:00Z">
+      <description>
+	<p>
+	  This release fixes only MinGW-specific problems.
+	</p>
+        <ul>
+	  <li> wxMaxima now ships around a pecularity in MinGW  </li>
+	  <li> wxMaxima now ships around a MinGW-specific bug in catch2 </li>
+	</ul>
+      </description>
+    </release>
+
     <release version="20.06.4" date="2020-06-06T10:30:00Z">
       <description>
 	<p>