chore(v2): configure release-please (#191)

diff --git a/.release-please-manifest.json b/.release-please-manifest.json
new file mode 100644
index 0000000..64248de
--- /dev/null
+++ b/.release-please-manifest.json
@@ -0,0 +1,3 @@
+{
+    "v2": "2.3.0"
+}
diff --git a/release-please-config.json b/release-please-config.json
new file mode 100644
index 0000000..61ee266
--- /dev/null
+++ b/release-please-config.json
@@ -0,0 +1,10 @@
+{
+    "release-type": "go-yoshi",
+    "separate-pull-requests": true,
+    "include-component-in-tag": false,
+    "packages": {
+        "v2": {
+            "component": "v2"
+        }
+    }
+}
diff --git a/v2/gax.go b/v2/gax.go
index 9272b3e..36cdfa3 100644
--- a/v2/gax.go
+++ b/v2/gax.go
@@ -35,5 +35,7 @@
 // to simplify code generation and to provide more convenient and idiomatic API surfaces.
 package gax
 
+import "github.com/googleapis/gax-go/v2/internal"
+
 // Version specifies the gax-go version being used.
-const Version = "2.3.0"
+const Version = internal.Version
diff --git a/v2/internal/version.go b/v2/internal/version.go
new file mode 100644
index 0000000..cc46e10
--- /dev/null
+++ b/v2/internal/version.go
@@ -0,0 +1,33 @@
+// Copyright 2022, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package internal
+
+// Version is the current tagged release of the library.
+const Version = "2.3.0"