How do I update Itext7 to version 7.1.1 - eclipse

Question

This seems like it should be simple but I cannot find anything on how to upgrade to newer versions of itext7. I am using an Eclipse maven project with itext7 version 7.0.4 and would like to update to 7.1.1. However, I can find nothing that tells me how to do that. Neither the Eclipse update menu or the Maven menu has an option to update itext7. Can someone point me to the documentation on how to do an update? TIA.
After answer:
I am not getting the libraries but instead getting conflicts:
I can't seem to post my pom.xml using code tags (I guess the formatter has a problem with XML code because of the <>) but I will include it if someone tells me how. I've uploaded the pom file to DropBox:
pom.xml

Answer 1

(Turning #mkl's and #amedee's comments into an answer)
In your project there is a file pom.xml which contains the Maven project definition. In there is a dependencies section with entries for the iText artifacts (among others). The version is therein. Well, it could also be in a separate dependencies management section or in a parent pom.xml referenced in your file.
As soon as you update the POM file, you can update the Eclipse project configuration in your Eclipse Maven menu. That will, if necessary, automatically download the jar artifacts. If your Eclipse Maven integration is properly configured, that is, and if your computer has proper internet connectivity.
Old versions will remain in your local repository but won't be in the class path anymore.
Also check out our getting started guide. Which contains an example POM snippet.
https://developers.itextpdf.com/itext7/download-and-install-information/Java
If you put your iText version number in POM properties, then you only have to update the value once when you want to upgrade. Like this:
<properties>
<itext.version>7.1.1</itext.version>
</properties>
and then
<dependencies>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>kernel</artifactId>
<version>${itext.version}</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>io</artifactId>
<version>${itext.version}</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>layout</artifactId>
<version>${itext.version}</version>
</dependency>
...
</dependencies>