Change snapshot version numbers to begin with a _bigger_ number.

In pre-[modularization](#2970) cl/725625326, I had pledged not to bikeshed over this. But it turns out that the number matters to some part of our JDiff pipeline, which has been broken since that CL. (Then I broke it _even more_ by introducing usages of `java.io.Serial` (cl/726154745), which I've since rolled back externally (cl/726521329).)

We still really should [finish setting up japicmp](google/error-prone#4311 (comment)) to replace JDiff, but again, I just want to unbreak publishing documentation for releases and snapshots.

(I will still view this as a _small_ bit of evidence that biggest version number is best version number for snapshot purposes :))

RELNOTES=n/a
PiperOrigin-RevId: 729117340

Author: cpovirk

README.md

@@ -71,8 +71,8 @@ consult the
 ## Snapshots and Documentation
 
 Snapshots of Guava built from the `master` branch are available through Maven
-using version `1.0-HEAD-jre-SNAPSHOT`, or `1.0-HEAD-android-SNAPSHOT` for the
-Android flavor.
+using version `999.0.0-HEAD-jre-SNAPSHOT`, or `999.0.0-HEAD-android-SNAPSHOT`
+for the Android flavor.
 
 [Snapshot API Javadoc][guava-snapshot-api-docs] as well as
 [Snapshot API Diffs][guava-snapshot-api-diffs] are also available.

android/guava-bom/pom.xml

@@ -8,7 +8,7 @@
 
   <groupId>com.google.guava</groupId>
   <artifactId>guava-bom</artifactId>
-  <version>1.0-HEAD-android-SNAPSHOT</version>
+  <version>999.0.0-HEAD-android-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <parent>

android/guava-testlib/pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.guava</groupId>
     <artifactId>guava-parent</artifactId>
-    <version>1.0-HEAD-android-SNAPSHOT</version>
+    <version>999.0.0-HEAD-android-SNAPSHOT</version>
   </parent>
   <artifactId>guava-testlib</artifactId>
   <name>Guava Testing Library</name>

android/guava-tests/pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.guava</groupId>
     <artifactId>guava-parent</artifactId>
-    <version>1.0-HEAD-android-SNAPSHOT</version>
+    <version>999.0.0-HEAD-android-SNAPSHOT</version>
   </parent>
   <artifactId>guava-tests</artifactId>
   <name>Guava Unit Tests</name>

android/guava/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.google.guava</groupId>
     <artifactId>guava-parent</artifactId>
-    <version>1.0-HEAD-android-SNAPSHOT</version>
+    <version>999.0.0-HEAD-android-SNAPSHOT</version>
   </parent>
   <artifactId>guava</artifactId>
   <packaging>bundle</packaging>

android/pom.xml

@@ -6,7 +6,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.guava</groupId>
   <artifactId>guava-parent</artifactId>
-  <version>1.0-HEAD-android-SNAPSHOT</version>
+  <version>999.0.0-HEAD-android-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Guava Maven Parent</name>
   <description>Parent for guava artifacts</description>
@@ -42,7 +42,7 @@
     <module.status>integration</module.status>
     <variant.jvmEnvironment>android</variant.jvmEnvironment>
     <variant.jvmEnvironmentVariantName>android</variant.jvmEnvironmentVariantName>
-    <otherVariant.version>1.0-HEAD-jre-SNAPSHOT</otherVariant.version>
+    <otherVariant.version>999.0.0-HEAD-jre-SNAPSHOT</otherVariant.version>
     <otherVariant.jvmEnvironment>standard-jvm</otherVariant.jvmEnvironment>
     <otherVariant.jvmEnvironmentVariantName>jre</otherVariant.jvmEnvironmentVariantName>
   </properties>

guava-bom/pom.xml

@@ -8,7 +8,7 @@
 
   <groupId>com.google.guava</groupId>
   <artifactId>guava-bom</artifactId>
-  <version>1.0-HEAD-jre-SNAPSHOT</version>
+  <version>999.0.0-HEAD-jre-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <parent>

guava-gwt/pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.guava</groupId>
     <artifactId>guava-parent</artifactId>
-    <version>1.0-HEAD-jre-SNAPSHOT</version>
+    <version>999.0.0-HEAD-jre-SNAPSHOT</version>
   </parent>
   <artifactId>guava-gwt</artifactId>
   <name>Guava GWT compatible libs</name>

guava-testlib/pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.guava</groupId>
     <artifactId>guava-parent</artifactId>
-    <version>1.0-HEAD-jre-SNAPSHOT</version>
+    <version>999.0.0-HEAD-jre-SNAPSHOT</version>
   </parent>
   <artifactId>guava-testlib</artifactId>
   <name>Guava Testing Library</name>

guava-tests/pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.google.guava</groupId>
     <artifactId>guava-parent</artifactId>
-    <version>1.0-HEAD-jre-SNAPSHOT</version>
+    <version>999.0.0-HEAD-jre-SNAPSHOT</version>
   </parent>
   <artifactId>guava-tests</artifactId>
   <name>Guava Unit Tests</name>