chore: regenerate README (#224)

This PR was generated using Autosynth. 🌈


<details><summary>Log from Synthtool</summary>

```
2021-01-13 09:10:34,103 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-grafeas/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-01-13 09:10:34,962 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

Full log will be available here:
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.github/readme/synth.metadata/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-grafeas.git",
-        "sha": "c16417c1a4bd8f8f5658efb2f815c5d991df8cd8"
+        "sha": "77ea10c5bb51a8c7880275be5890cc539f75e476"
       }
     },
     {

README.md

@@ -17,18 +17,18 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>io.grafeas</groupId>
   <artifactId>grafeas</artifactId>
-  <version>1.0.5</version>
+  <version>1.0.7</version>
 </dependency>
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'io.grafeas:grafeas:1.0.5'
+compile 'io.grafeas:grafeas:1.0.7'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "io.grafeas" % "grafeas" % "1.0.5"
+libraryDependencies += "io.grafeas" % "grafeas" % "1.0.7"
 ```
 
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