Document Third-Party Code changes in Qt 5.13.0

The changes where obtained by running

  qtattributionsscanner -output-format json

in the sources of both Qt 5.12.3 and Qt 5.13.0 checkouts, and diff'ing
these.

Task-number: QTBUG-75417
Change-Id: I86cc4cd528284644368620a150de70791f8f8b52
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

doc/src/legal/licensechanges.qdoc

@@ -38,8 +38,19 @@
 
     \section2 Qt Core Module
 
-    The copy of the \l{The Public Suffix List} got updated on 2019-02-20.
-    The upstream license is now MPL 2.0.
+    \list
+        \li The copy of the \l{The Public Suffix List} got updated on 2019-02-20.
+        The upstream license is now MPL 2.0.
+        \li \l{PCRE2} got updated to upstream version 10.33.
+        \li \l{PCRE2 - Stack-less Just-In-Time Compiler} got updated to upstream version 10.33.
+    \endlist
+
+    \section2 Qt GUI Module
+
+    \list
+        \li \l{LibJPEG-turbo} got updated to upstream version 2.0.2.
+        \li \l{LibPNG} got updated to upstream version 1.6.37.
+    \endlist
 
     \section2 Qt DBUS Module
 
@@ -65,6 +76,10 @@
     The license of \l{Wintab API} was now classified as 'Custom' instead of
     'Public Domain'.
 
+    \section2 Qt SQL Module
+
+    \l{SQLite} got updated to upstream version 3.27.1.
+
     \section1 Qt 5.12.2
 
     \section2 Qt GUI Module