Finalize CHANGELOG.md for 2018.3.0
Finalize CHANGELOG.md for 2018.3.0

JetBrains/resharper-cyclomatic-complexity,JetBrains/resharper-cyclomatic-complexity,JetBrains/resharper-cyclomatic-complexity,JetBrains/resharper-cyclomatic-complexity,JetBrains/resharper-cyclomatic-complexity