Adds block statement "set". Resolves #45.

[palchukovsky]

No description provided.

[codecov]

Codecov Report

Merging #131 into master will increase coverage by 0.11%.
The diff coverage is 90.58%.

@@            Coverage Diff             @@
##           master     #131      +/-   ##
==========================================
+ Coverage   87.13%   87.25%   +0.11%     
==========================================
  Files          64       64              
  Lines        7145     7208      +63     
==========================================
+ Hits         6226     6289      +63     
  Misses        919      919

Impacted Files	Coverage Δ
test/errors_test.cpp	98.8% <ø> (ø)	⬆️
src/lexer.h	94.44% <100%> (+8.14%)	⬆️
src/internal_value.cpp	79.67% <100%> (+0.11%)	⬆️
test/statements_tets.cpp	100% <100%> (ø)	⬆️
src/statements.h	84.82% <80%> (-0.18%)	⬇️
src/statements.cpp	94.23% <90.9%> (-0.07%)	⬇️
src/template_parser.cpp	94.32% <91.89%> (+0.03%)	⬆️
src/error_info.cpp	56.52% <0%> (-1.74%)	⬇️
... and 1 more

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #131 into master will increase coverage by 0.11%.
The diff coverage is 90.58%.

@@            Coverage Diff             @@
##           master     #131      +/-   ##
==========================================
+ Coverage   87.13%   87.25%   +0.11%     
==========================================
  Files          64       64              
  Lines        7145     7208      +63     
==========================================
+ Hits         6226     6289      +63     
  Misses        919      919

Impacted Files	Coverage Δ
test/errors_test.cpp	98.8% <ø> (ø)	⬆️
src/lexer.h	94.44% <100%> (+8.14%)	⬆️
src/internal_value.cpp	79.67% <100%> (+0.11%)	⬆️
test/statements_tets.cpp	100% <100%> (ø)	⬆️
src/statements.h	84.82% <80%> (-0.18%)	⬇️
src/statements.cpp	94.23% <90.9%> (-0.07%)	⬇️
src/template_parser.cpp	94.32% <91.89%> (+0.03%)	⬆️
src/error_info.cpp	56.52% <0%> (-1.74%)	⬇️
... and 1 more

---

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 f826cec...b0a5d81. Read the comment docs.