guava update

gradle.properties

 junitVersion = 5.8.2
 githooksVersion = 1.2.0
 gsonVersion  = 2.8.9
-guavaVersion = 30.1.1-jre
+guavaVersion = 31.1-jre
 nodePluginVersion = 3.1.1
 nodeVersion = 16.3.0
 spotbugsVersion = 4.7.0

src/main/java/gov/usgs/earthquake/nshmp/gmm/PezeshkEtAl_2018.java

@@ -209,7 +209,7 @@ public abstract class PezeshkEtAl_2018 implements GroundMotionModel {
 
   static final class Seed_PZCT18_M1SS extends PezeshkEtAl_2018 {
     static final String MODEL = Model.M1SS;
-    static final String NAME = NgaEast_2018.Seed.NAME + " : " + MODEL + "*";
+    static final String NAME = NgaEast_2018.Seed.NAME + MODEL + "*";
 
     Seed_PZCT18_M1SS(Imt imt) {
       super(imt, MODEL);
@@ -218,7 +218,7 @@ public abstract class PezeshkEtAl_2018 implements GroundMotionModel {
 
   static final class Seed_PZCT18_M2ES extends PezeshkEtAl_2018 {
     static final String MODEL = Model.M2ES;
-    static final String NAME = NgaEast_2018.Seed.NAME + " : " + MODEL + "*";
+    static final String NAME = NgaEast_2018.Seed.NAME + MODEL + "*";
 
     Seed_PZCT18_M2ES(Imt imt) {
       super(imt, MODEL);