Merge pull request #276 from FintanH/update-smallvec

Update smallvec to 1.6

Author: Amanieu

core/Cargo.toml

@@ -11,7 +11,7 @@ edition = "2018"
 
 [dependencies]
 cfg-if = "1.0.0"
-smallvec = "1.0"
+smallvec = "1.6.1"
 petgraph = { version = "0.5.1", optional = true }
 thread-id = { version = "3.3.0", optional = true }
 backtrace = { version = "0.3.49", optional = true }