1.6.0 release candidate

Breaking changes

• rename Unexpected to ItemsMode in runtime_value and runtime_validation

Notable changes (new)

• fix #51 support base_url param, base_path param
• add support for application/x-www.form-urlencoded. fix #49
• add {{expected}} after unnoticed breaking change in c661b85. fixes #54
• introduce transform callback. fixes #53
• add possibility to set params at the beginning of a transaction. fixes #56

Notable changes (fixes)

• fix #63. big bug: all float parameters were rounded to 1 decimal
• fix #64. big bug: cannot store non-text params
• fix #65. big bug: runtime_value and runtime_validation bindings
• fix #60. big bug: MATCH_ANY would ignore any surrounding required patterns

Full list of changes since 1.5.4