envconfig

• [fix] Fully qualify Ok enum variant in the generated code.

• [breaking] Nested config fields now needs to be marked with #[envconfig(nested)]
• Environment variable can be automatically derived from a field name (e.g. db_host will be tried to loaded from DB_HOST env var)
• Add install step in README
• Update syn dependency to 2.x.x

• Add init_from_hashmap to initialize config from HashMap<String, String> in unit tests

• Get rid of thiserror dependency

• Use rust edition 2018
• Make envconfig re-export Envconfig macro from envconfig_derive (no need to use envconfig_derive explicitly anymore)
• Deprecate init() function in favor of init_from_env()

• Update syn, quote and proc-macro2 dependencies to be 1.x.x

• Use thiserror for errors

• Support nested structures

• Fix Result overlapping bug

• Support default attribute to specify default values

• Support of Option<T> types
• Rewrite envconfig_derive to use the latests versions of syn and quote crates
• Improve error messages on panics
• Add skeptic to generate tests based on README code examples

• [breaking] Use envconfig attribute instead of from in the derive macro
• [breaking] Remove init_or_die() function from Envconfig trait
• [breaking] In envconfig_derive: rename function envconfig() -> derive()
• [improvement] Add better documentation to the crate

Create symlinks to LICENSE and README

• [breaking] Use derive macro instead of macro_rules

• First public release