Update src/Catalyst.jl

Author: isaacsas

src/Catalyst.jl

@@ -7,9 +7,9 @@ using DocStringExtensions
 using SparseArrays, DiffEqBase, Reexport, Setfield
 using LaTeXStrings, Latexify, Requires
 using LinearAlgebra, Combinatorics
-using JumpProcesses: JumpProcesses,
-                     JumpProblem, MassActionJump, ConstantRateJump,
-                     VariableRateJump
+using JumpProcesses: JumpProcesses, JumpProblem, 
+                     MassActionJump, ConstantRateJump, VariableRateJump,
+                     SpatialMassActionJump
 
 # ModelingToolkit imports and convenience functions we use
 using ModelingToolkit