Upgrade spotbugs to 3.1.12

Change-Id: I8093ce8342ab98f12ffabaf2862e6f1b161c4c87
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

pom.xml

@@ -203,7 +203,7 @@
     <tycho-extras-version>1.3.0</tycho-extras-version>
     <gson-version>2.8.2</gson-version>
     <bouncycastle-version>1.61</bouncycastle-version>
-    <spotbugs-maven-plugin-version>3.1.11</spotbugs-maven-plugin-version>
+    <spotbugs-maven-plugin-version>3.1.12</spotbugs-maven-plugin-version>
     <maven-surefire-version>2.22.2</maven-surefire-version>
     <maven-compiler-plugin-version>3.8.1</maven-compiler-plugin-version>
     <maven-project-info-reports-plugin-version>3.0.0</maven-project-info-reports-plugin-version>