0.9

A lot of changes since last release, so new major version.

Changes:

• "Strict mode" the same behavior as in ruby's
• evaluating improvements:
  • apply incorrect expression evaluating (to follow but in source library Shopify/liquid#1102 )
  • out tag aware lex vs strict (still Shopify/liquid#1102)
  • New flavour LIQP added. Made it default. It has no that bug (Shopify/liquid#1102)
• made comparisons in expressions to behave more like ruby's ones:
  • Fix number comparisons when applying filters, BigDecimal handling
  • Fix dates comparisons
  • fix null and non-nullable object comparing
• code cleanup and maintenance:
  • Flavor.filters vs ParserSettings.filters differentiation, make more use of new Filters class(immutable)
  • ProtectionSettings removed and its settings are now are optional on TemplateParser class, making single place for all configurations for the template/library
  • jacoco-maven-plugin added. now we see the test coverage.
  • get rid of static context in Filter (now the filters are always parameters with some pre-defaults)
  • a lot of deprecated methods removed (main reason of new major version)
  • LiquidParser: Fix antlr warning about matching an empty string
• TemplateContext: provide access to Filters, Insertions, parent context
• Update antlr4 dependency version to 4.13.0
• updating readme to reflect latest library state

Many thanks to @kohlschuetter and @msangel