Update prereqs (#17)

Author: PhilWakelin

README.md

@@ -20,9 +20,9 @@ Sample CICS Java programs demonstrating how to use the JCICS API in an OSGi JVM
 ## Pre-requisites
 
 * CICS TS V5.1 or later, due to the usage of the `getString()` methods.
-* Java SE 7 or later on the z/OS system.
-* Java SE 7 or later on the workstation.
-* Eclipse with CICS Explorer SDK installed.
+* Java SE 1.8 on the z/OS system
+* Java SE 1.8 on the workstation
+* Eclipse with the IBM CICS SDK for Java EE, Jakarta EE and Liberty, or any IDE that supports usage of the Maven Central artifact [com.ibm.cics:com.ibm.cics.server.](https://search.maven.org/artifact/com.ibm.cics/com.ibm.cics.server) 
 
 ## Configuration