change spec date: TBD -> date of SEP vote results

Author: jamesscottbrown

specification/sbolvisual.tex

@@ -204,7 +204,7 @@
 
 \packageTitle{\latex Class for SBML Package Specifications}
 \packageVersion{Version 3.0}
-\packageVersionDate{TBD}
+\packageVersionDate{2021-04-14}
 
 % BBF RFC \rfcnum{}: 
 \title{Synthetic Biology Open \\Language Visual (SBOL Visual) Version~3.0}