* fixed #302 update Spring-Boot to Version to 2.3.7

* Issue #303 update Spring-Boot to Version to 2.4.1
* fixed #304 update webjars for bootstrap et al.
* fixed #305 Update spring-data-releasetrain to latest GA
* fixed #306 Update spring-session-bom to latest GA

Author: thomaswoehlke

pom.xml

@@ -300,7 +300,11 @@
                 <version>${webjars.jquery.version}</version>
             </dependency>
             <dependency>
-                <groupId>org.webjars</groupId>
+                <groupId>org.webjars.npm</groupId>
+                <version>${webjars.popper.js.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.webjars.npm</groupId>
                 <artifactId>bootstrap</artifactId>
                 <version>${webjars.bootstrap.version}</version>
             </dependency>
@@ -569,6 +573,10 @@
 			<groupId>org.webjars</groupId>
 			<artifactId>jquery</artifactId>
 		</dependency>
+        <dependency>
+            <groupId>org.webjars</groupId>
+            <artifactId>popper.js</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.webjars</groupId>
             <artifactId>bootstrap</artifactId>

src/main/resources/templates/layout/page.html

@@ -72,7 +72,7 @@
 	</footer>
 	<script th:src="@{/js/google-analytics.js}"></script>
     <script th:src="@{/webjars/jquery/3.5.1/jquery.js}"></script>
-    <script th:src="@{/webjars/popper.js/1.16.1/umd/popper.min.js}"></script>
+    <script th:src="@{/webjars/popper.js/2.5.4/umd/popper.min.js}"></script>
     <script th:src="@{/webjars/bootstrap/4.5.3/js/bootstrap.bundle.js}"></script>
     <script th:src="@{/webjars/font-awesome/5.15.1/js/all.js}"></script>
 	<!--/* Per-page placeholder for additional links */-->