close #158: add globals to simulation environment

[Enchufa2]

No description provided.

[codecov]

Codecov Report

Merging #174 into master will decrease coverage by 0.03%.
The diff coverage is 98.24%.

@@            Coverage Diff             @@
##           master     #174      +/-   ##
==========================================
- Coverage   99.86%   99.83%   -0.04%     
==========================================
  Files          50       50              
  Lines        2914     2945      +31     
==========================================
+ Hits         2910     2940      +30     
- Misses          4        5       +1

Impacted Files	Coverage Δ
R/simmer-methods.R	100% <100%> (ø)	⬆️
R/schedule-class.R	100% <100%> (ø)	⬆️
inst/include/simmer/process/manager.h	100% <100%> (ø)	⬆️
inst/include/simmer/simulator_impl.h	99.19% <100%> (ø)	⬆️
R/wrap-class.R	100% <100%> (ø)	⬆️
src/simulator.cpp	100% <100%> (ø)	⬆️
R/simmer-class.R	99.45% <95.45%> (-0.55%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d578dbb...419ecba. Read the comment docs.