upgrade spring, add javadoc, formatting

core/pom.xml

@@ -7,7 +7,7 @@
 		<artifactId>webstly-main</artifactId>
 		<version>${revision}</version>
 	</parent>
-	
+
 	<name>core</name>
 	<artifactId>webstly-core</artifactId>
 
@@ -56,6 +56,12 @@
 			<version>1.7</version>
 		</dependency>
 
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+			<version>31.1-jre</version>
+		</dependency>
+
 		<dependency>
 			<groupId>com.google.code.gson</groupId>
 			<artifactId>gson</artifactId>
@@ -64,7 +70,7 @@
 		<dependency>
 			<groupId>org.passay</groupId>
 			<artifactId>passay</artifactId>
-			<version>1.6.0</version>
+			<version>1.6.1</version>
 		</dependency>
 
 		<dependency>
@@ -76,7 +82,7 @@
 		<dependency>
 			<groupId>org.bouncycastle</groupId>
 			<artifactId>bcprov-jdk15on</artifactId>
-			<version>1.66</version>
+			<version>1.70</version>
 		</dependency>
 
 		<dependency>
@@ -87,7 +93,7 @@
 		<dependency>
 			<groupId>javax.measure</groupId>
 			<artifactId>unit-api</artifactId>
-			<version>2.1.2</version>
+			<version>2.1.3</version>
 		</dependency>
 
 		<dependency>