deps: update core dependencies to v29 (#78)

Author: renovate-bot

google-cloud-nio-examples/pom.xml

@@ -19,7 +19,7 @@
  <dependency>
  <groupId>com.google.guava</groupId>
  <artifactId>guava</artifactId>
- <version>28.2-android</version>
+ <version>29.0-android</version>
  </dependency>
  </dependencies>
  <properties>

pom.xml

@@ -73,7 +73,7 @@
  <github.global.server>github</github.global.server>
  <site.installationModule>google-cloud-storage-nio-parent</site.installationModule>
  <junit.version>4.13</junit.version>
- <guava.version>28.2-android</guava.version>
+ <guava.version>29.0-android</guava.version>
  </properties>
 
  <dependencyManagement>