Bump logback-classic from 1.0.13 to 1.2.0 in /blobstore-uploader

Bumps logback-classic from 1.0.13 to 1.2.0.

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/blobstore-uploader/pom.xml b/blobstore-uploader/pom.xml
index 57f7014..5278ea9 100644
--- a/blobstore-uploader/pom.xml
+++ b/blobstore-uploader/pom.xml
@@ -39,7 +39,7 @@
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
-           <version>1.0.13</version>
+           <version>1.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.jclouds</groupId>