Convert boolean values in vm/emit

[fyrchik]

Close #1821 .

[codecov]

Codecov Report

Merging #1822 (5500915) into master (f087775) will increase coverage by 0.10%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1822      +/-   ##
==========================================
+ Coverage   83.54%   83.65%   +0.10%     
==========================================
  Files         272      272              
  Lines       21907    21907              
==========================================
+ Hits        18303    18326      +23     
+ Misses       2489     2465      -24     
- Partials     1115     1116       +1     

Impacted Files	Coverage Δ
pkg/vm/emit/emit.go	100.00% <100.00%> (ø)
pkg/network/server.go	72.76% <0.00%> (+1.05%)	⬆️
pkg/services/oracle/request.go	62.29% <0.00%> (+4.91%)	⬆️
pkg/services/oracle/oracle.go	90.58% <0.00%> (+11.76%)	⬆️

---

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 f087775...5500915. Read the comment docs.

[roman-khimov]

Refs. neo-project/neo-vm#330. CONVERT is pricy though...