Update SWC-118.md

disclaimer, links to modern stuff

Author: chaals

entries/docs/SWC-118.md

@@ -1,3 +1,14 @@
+# Please note, this content is no longer actively maintained.
+
+The content of the SWC registry has not been thoroughly updated since 2020. It is known to be incomplete and may contain errors as well as crucial omissions.
+
+For currently maintained guidance on known Smart Contract vulnerabilities written primarily as guidance for security reviewers, please see the
+[EEA EthTrust Security Levels specification](https://entethalliance.org/specs/ethtrust-sl). As well as the latest release version, an
+[Editor's draft](https://entethalliance.github.io/eta-registry/security-levels-spec.html) is available, that represents the latest work of the group developing the specification.
+
+General guidance for developers on what to consider to ensure security, that is currently maintained, is also available through the 
+[Smart Contract Security Verification Standard (SCSVS)](https://github.com/ComposableSecurity/SCSVS).
+
 # Title
 
 Incorrect Constructor Name
@@ -19,6 +30,11 @@ Solidity version 0.4.22 introduces a new `constructor` keyword that make a const
 
 - [SigmaPrime - Constructors with Care](https://blog.sigmaprime.io/solidity-security.html#constructors)
 
+### EEA EthTrust Security Levels Specification
+
+- [**[S] Use a Modern Compiler**](https://entethalliance.org/specs/ethtrust-sl/#req-1-compiler-060)
+- [**[Q] Code Linting**](https://entethalliance.org/specs/ethtrust-sl/#req-3-linted)
+
 ## Samples
 
 ### incorrect_constructor_name1.sol