Bump to version v1.0.2 (#2001)

Update lighthouse to version `v1.0.2`. 

There are two major updates in this version:
- Updates to the task executor to tokio 0.3 and all sub-dependencies relying on core execution, including libp2p
- Update BLST

common/lighthouse_version/src/lib.rs

@@ -10,7 +10,7 @@ use target_info::Target;
 /// `Lighthouse/v0.2.0-1419501f2+`
 pub const VERSION: &str = git_version!(
     args = ["--always", "--dirty=+"],
-    prefix = "Lighthouse/v1.0.1-",
+    prefix = "Lighthouse/v1.0.2-",
     fallback = "unknown"
 );