fix(hex): Preserve minor versions when in bump mode (#8326)

* feat(hex): Preserve minor versions when in bump mode

* Fix linting issue

* Add minor test

Co-authored-by: Rhys Arkins <rhys@arkins.net>

lib/versioning/hex/index.spec.ts

@@ -128,7 +128,15 @@ describe('lib/versioning/hex', () => {
           fromVersion: '1.2.3',
           toVersion: '2.0.7',
         })
-      ).toEqual('~> 2');
+      ).toEqual('~> 2.0');
+      expect(
+        hexScheme.getNewValue({
+          currentValue: '~> 1.2',
+          rangeStrategy: 'bump',
+          fromVersion: '1.2.3',
+          toVersion: '1.3.1',
+        })
+      ).toEqual('~> 1.3');
       expect(
         hexScheme.getNewValue({
           currentValue: '~> 1.2.0',

lib/versioning/hex/index.ts

@@ -69,10 +69,16 @@ const getNewValue = ({
     toVersion,
   });
   newSemver = npm2hex(newSemver);
-  if (/~>\s*(\d+\.\d+)$/.test(currentValue)) {
+  if (/~>\s*(\d+\.\d+\.\d+)$/.test(currentValue)) {
     newSemver = newSemver.replace(
-      /\^\s*(\d+\.\d+(\.\d)?)/,
-      (_str, p1: string) => `~> ${p1.slice(0, -2)}`
+      /[\^~]\s*(\d+\.\d+\.\d+)/,
+      (_str, p1: string) => `~> ${p1}`
+    );
+  } else if (/~>\s*(\d+\.\d+)$/.test(currentValue)) {
+    newSemver = newSemver.replace(
+      /\^\s*(\d+\.\d+)/,
+      (_str, p1: string) =>
+        `~> ${rangeStrategy !== 'bump' ? p1.slice(0, -2) : p1}`
     );
   } else {
     newSemver = newSemver.replace(/~\s*(\d+\.\d+\.\d)/, '~> $1');