pom: Update antlr4 dependency to 4.13.1

Also update eforms-core to 1.4.0-SNAPSHOT, so that it uses the same
version of antlr4, to avoid any potential problem, as parsers generated
by antlr4 version 4.9 are not compatible with more recent versions.

pom.xml

@@ -59,10 +59,10 @@
     <sdk.antlr4.dir>${project.build.directory}/eforms-sdk/antlr4</sdk.antlr4.dir>
 
     <!-- Versions - eForms -->
-    <version.eforms-core>1.3.0</version.eforms-core>
+    <version.eforms-core>1.4.0-SNAPSHOT</version.eforms-core>
 
     <!-- Versions - Third-party libraries -->
-    <version.antlr4>4.9.3</version.antlr4>
+    <version.antlr4>4.13.1</version.antlr4>
     <version.commons-lang3>3.12.0</version.commons-lang3>
     <version.logback>1.2.11</version.logback>
     <version.jackson>2.13.4</version.jackson>