v0.16.0

• Force serde to always be on (7f1e2027)
• context: Reduce scope of public API (866eb0cb)
  • Isolate context creation (00cac8cb)
  • Isolate Stack state (3f8e9432)
  • Isolate cycle state (34dc950a)
  • Isolate interrupt state (06596643)
• error: Clean up error API (6a950048)
  • filter: Switch to standard error type (3d18b718)
• Cleanup each crate's API (2e4ab661)
  • Reduce allocations (cbb1d254, closes #188)
• interpreter: Clarify names (6b96f92b)
• perf: Don't clone globals (fbc1c153)
• render: Use a Write (0093a595, closes #187)
• value:
  • Support str's (e3aae68d)
  • Reduce allocations with Cow (7fd1e62d)

Features

• for-block: Support iterating on Object (2469bfc0, closes #201)
• value: Create to_value (61ae6de6)

Performance

• Reduce allocations (cbb1d254, closes #188)
• render: Use a Write (0093a595, closes #187)
• value: Support &'static str's (e3aae68d) (7fd1e62d)