Upgrade org.slf4j:slf4j-log4j12, ch.qos.logback:logback-classic, logback-core, bouncycastle versions

Update bouncycastle version from 1.69 to 1.70
Update variable for GhostscriptHelperTest in order to be runnable on more systems

DEVSIX-6218, DEVSIX-6278

Author: Kate Ivanova

io/src/test/java/com/itextpdf/io/util/GhostscriptHelperTest.java

@@ -64,7 +64,7 @@ public class GhostscriptHelperTest extends ExtendedITextTest {
 
     // In some of the test we will check whether Ghostscript has printed its help message to the console.
     // The value of this threshold should be definitely less than the length of the help message.
-    private static final int SYSTEM_OUT_LENGTH_LIMIT = 400;
+    private static final int SYSTEM_OUT_LENGTH_LIMIT = 450;
 
     @Before
     public void setUp() {

pom.xml

@@ -72,7 +72,7 @@
 
   <properties>
     <argLine>-Xmx1024m</argLine>
-    <bouncycastle.version>1.69</bouncycastle.version>
+    <bouncycastle.version>1.70</bouncycastle.version>
     <dependencyCheck.version>6.0.3</dependencyCheck.version>
     <failsafe.version>3.0.0-M3</failsafe.version>
     <integrationtests>com.itextpdf.test.annotations.type.IntegrationTest</integrationtests>
@@ -83,7 +83,7 @@
     <javadoc.version>3.0.1</javadoc.version>
     <junit.version>4.13.2</junit.version>
     <junitparams.version>1.0.4</junitparams.version>
-    <logback.version>1.2.4</logback.version>
+    <logback.version>1.2.10</logback.version>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.jar.version>3.1.0</maven.jar.version>
@@ -93,7 +93,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <sampletests>com.itextpdf.test.annotations.type.SampleTest</sampletests>
     <skipTests>true</skipTests>
-    <slf4j.version>1.7.31</slf4j.version>
+    <slf4j.version>1.7.33</slf4j.version>
     <slowtests>com.itextpdf.test.annotations.type.SlowTest</slowtests>
     <sonar.dependencyCheck.htmlReportPath>target/dependency-check-report.html</sonar.dependencyCheck.htmlReportPath>
     <sonar.dependencyCheck.reportPath>target/dependency-check-report.xml</sonar.dependencyCheck.reportPath>