4.0.0: Support code generation

package: add netstandard 2.0
feature: support code generation
feature: 2 ways mapping
feature: unflattening
feature: map to constructor
feature: map by properties path
feature: max depth
feature: add before mapping

3.3.2

fix: Compile using ForDestinationType
fix: include non-public member
fix: EF not support Expression.Default

3.3.1

fix: map to target from null value should return null

3.3.0

• minor performance improvement
• improve script readability
• support ExpressionDebugger

3.2.0

• feature: Support IDictionary (sp thx to @sven-n )
• fix: ignore index properties for auto mapping

3.1.8

fix mapping from static property throw NullReferenceException

3.1.7

• allow map to target without default constructor (sp thx to Burgyn)
• throw when pass nest destination member access to Map method

3.1.6

fix #118 mapping enum to poco

3.1.5

fix nullable enum mapping

3.1.4

fix: Mapping collection with derived types not working properly
allow mapping class extended with IEnumerable (sp thx to Satano)