Bug fix: default value for embed_sourcemap config option

Hello there!

This release fixes a bug when the default real value is lost after the cache is warmed up for the embed_sourcemap config option. Also includes many tweaks to the docs.

What's Changed

• Set a default value for $isDebug in SymfonycastsSassExtension by @evertharmeling in #21
• Some minor fixes in RST syntax by @bocharsky-bw in #15
• Fix documentation formatting by @hhamon in #17
• [DOC] Add missing ticks in index.rst by @smnandre in #18
• fix typo by @RubenHollevoet in #19
• Update composer package index.rst by @RubenHollevoet in #20

New Contributors

• @evertharmeling made their first contribution in #21
• @bocharsky-bw made their first contribution in #15
• @hhamon made their first contribution in #17
• @smnandre made their first contribution in #18
• @RubenHollevoet made their first contribution in #19

Full Changelog: v0.2.2...v0.2.3