docs: Note v1.13.0 release

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/docs/Releases.md b/docs/Releases.md
index c350426..a2e338a 100644
--- a/docs/Releases.md
+++ b/docs/Releases.md
@@ -1,6 +1,17 @@
 History of SeaBIOS releases. Please see [download](Download) for
 information on obtaining these releases.
 
+SeaBIOS 1.13.0
+==============
+
+Available on 20191209. Major changes in this release:
+
+* Support for reading logical CHS drive information from QEMU
+* Workaround added for misbehaving optionroms that grab "int19"
+* The TPM 2 "PCR bank" option can now be set from the TPM menu
+* SeaVGABIOS support for QEMU "atiext" display
+* Several bug fixes and code cleanups
+
 SeaBIOS 1.12.0
 ==============