Update just-the-docs and feature flags docs

docs/4-features.md

@@ -6,6 +6,7 @@ permalink: /features/
 
 # Feature Flags and Optional Dependencies
 
+- `std` (enabled by default) - implements `JsonSchema` for types in the rust standard library (`JsonSchema` is still implemented on types in `core` and `alloc`, even when this feature is disabled). Disable this feature to use schemars in `no_std` environments.
 - `derive` (enabled by default) - provides `#[derive(JsonSchema)]` macro
 - `preserve_order` - keep the order of struct fields in `Schema` properties
 - `raw_value` - implements `JsonSchema` for `serde_json::value::RawValue` (enables the serde_json `raw_value` feature)

docs/Gemfile

@@ -10,7 +10,7 @@ source "https://rubygems.org"
 # gem "jekyll", "~> 4.0.0"
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 # gem "minima", "~> 2.5"
-gem "just-the-docs", "= 0.8.2"
+gem "just-the-docs", "= 0.9.0"
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
 gem "github-pages", group: :jekyll_plugins

docs/_config.yml

@@ -27,7 +27,7 @@ url: "https://graham.cool" # the base hostname & protocol for your site, e.g. ht
 permalink: pretty
 
 # Build settings
-remote_theme: pmarsceill/just-the-docs@v0.8.2
+remote_theme: pmarsceill/just-the-docs@v0.9.0
 markdown: CommonMarkGhPages
 commonmark:
   options: ["UNSAFE", "FOOTNOTES"]