Force RecursiveFactorization to cache a bunch of precompiles

```julia
using OrdinaryDiffEq, SnoopCompile

function lorenz(du,u,p,t)
 du[1] = 10.0(u[2]-u[1])
 du[2] = u[1]*(28.0-u[3]) - u[2]
 du[3] = u[1]*u[2] - (8/3)*u[3]
end

u0 = [1.0;0.0;0.0]
tspan = (0.0,100.0)
prob = ODEProblem(lorenz,u0,tspan)
alg = Rodas5()
tinf = @snoopi_deep solve(prob,alg)

Before:
InferenceTimingNode: 2.668258/24.839223 on Core.Compiler.Timings.ROOT() with 51 direct children

After:
InferenceTimingNode: 2.285476/19.503069 on Core.Compiler.Timings.ROOT() with 54 direct children
```

Author: ChrisRackauckas

Project.toml

@@ -1,7 +1,7 @@
 name = "RecursiveFactorization"
 uuid = "f2c3362d-daeb-58d1-803e-2bc74f2840b4"
 authors = ["Yingbo Ma <[email protected]>"]
-version = "0.2.0"
+version = "0.2.1"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"

src/RecursiveFactorization.jl

@@ -2,4 +2,6 @@ module RecursiveFactorization
 
 include("./lu.jl")
 
+lu!(rand(2,2))
+
 end # module