CI check features (#1708)

To resolve issue #1136.

This is a cross verification against zepter.

- [cargo-featalign](https://github.com/hack-ink/cargo-featalign):
Verifies the proper propagation of all features.
- [zepter](https://github.com/ggwpez/zepter): Checks for accidentally
enabled features.

cc @ggwpez 

---
Switch to a new branch. Original PR #1537.

---------

Signed-off-by: Xavier Lau <xavier@inv.cafe>
Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

substrate/frame/support/procedural/Cargo.toml

@@ -29,14 +29,14 @@ frame-support-procedural-tools = { path = "tools" }
 macro_magic = { version = "0.5.0", features = ["proc_support"] }
 proc-macro-warning = { version = "1.0.0", default-features = false }
 expander = "2.0.0"
-sp-core-hashing = { path = "../../../primitives/core/hashing" }
+sp-core-hashing = { path = "../../../primitives/core/hashing", default-features = false }
 
 [dev-dependencies]
 regex = "1"
 
 [features]
 default = ["std"]
-std = []
+std = ["sp-core-hashing/std"]
 no-metadata-docs = []
 # Generate impl-trait for tuples with the given number of tuples. Will be needed as the number of
 # pallets in a runtime grows. Does increase the compile time!