Adapted parser; fixed issues

.gitignore

.gitmodules

.vscode/launch.json

package-lock.json

package.json

run-peg.js

src/Parser.d.ts

src/PseuCoParser.pegjs

src/ast/declarations/VariableDeclarations.ts

src/ast/declarations/VariableDeclarator.ts

src/ast/expressions/AssignDestination.ts

src/ast/expressions/AssignExpression.ts

src/ast/expressions/LiteralExpression.ts

src/ast/expressions/ProcedureCall.ts

src/ast/index.ts

src/ast/statements/ForInit.ts

src/ast/statements/ForStatement.ts

src/ast/statements/PrintStatement.ts

src/ast/statements/SelectStatement.ts

src/ast/statements/StatementBlock.ts