Update support matrix in readme.

README.md

@@ -59,19 +59,19 @@ The latest version of all supported platform packages can also be found [here](h
 We support most modern Linux platforms (and some that aren't so modern). That
 said, our formal tested matrix of Linux platforms includes the following:
 
-- CentOS 5, 6, and 7 (x86 and x64)
-- Debian 6, 7, 8 (x86 and x64) and Debian 9 x64
+- CentOS 6 and 7 (x86 and x64)
+- Debian 8 (x86 and x64) and Debian 9 x64
 - Oracle Linux 5, 6, and 7 (x86 and x64)
 - Red Hat Enterprise Linux Server 5 and 6, and 7 (x86 and x64)
   - Note: Red Hat 7.1 or later also runs on the PPC platform
-- SUSE Linux Enterprise Server 10, 11, and 12 (x86 and x64)
-- Ubuntu 12.04 LTS, 14.04 LTS, and 16.04 LTS (x86 and x64)
+- SUSE Linux Enterprise Server 11, 12 (x86 and x64), 12 ppc and 15.
+- Ubuntu 14.04 LTS, 16.04 LTS and 18.04 LTS (x86 and x64)
 
 ### Supported Unix Operating Systems
 
 As well as the Linux platforms supported, OMI is also tested to work on the following platforms:
 
-- AIX 6.1 and 7.1
+- AIX 7.1
 - HPUX 11.31 (ia64 only)
 - Solaris 10 and 11 (Sparc and x86)