Bump slf4j-api from 1.7.30 to 1.7.35 (#200)

Bumps [slf4j-api](https://github.com/qos-ch/slf4j) from 1.7.30 to 1.7.35.
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](qos-ch/slf4j@v_1.7.30...v_1.7.35)

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Stephen Colebourne <stephen@opengamma.com>

Author: dependabot[bot]

modules/pom.xml

@@ -421,7 +421,7 @@
     <joda.beans.version>2.8.0</joda.beans.version>
     <junit5.version>5.8.2</junit5.version>
     <logback.version>1.2.9</logback.version>
-    <slf4j.version>1.7.30</slf4j.version>
+    <slf4j.version>1.7.35</slf4j.version>
     <okhttp.version>3.14.9</okhttp.version>
     <okio.version>2.10.0</okio.version>
     <!-- Properties for joda-beans-maven-plugin -->