fix(composer): lazy evaluate fromVersion major

lib/versioning/semver-composer/index.js

@@ -55,7 +55,6 @@ const minSatisfyingVersion = (versions, range) =>
   semver.minSatisfyingVersion(versions.map(composer2npm), composer2npm(range));
 
 function getNewValue(currentValue, rangeStrategy, fromVersion, toVersion) {
-  const fromMajor = getMajor(fromVersion);
   const toMajor = getMajor(toVersion);
   const toMinor = getMinor(toVersion);
   let newValue;
@@ -84,7 +83,7 @@ function getNewValue(currentValue, rangeStrategy, fromVersion, toVersion) {
     newValue = `~${toMajor}`;
   } else if (currentValue.match(/^~([0-9]*(?:\.[0-9]*)?)$/)) {
     // handle ~4.1 case
-    if (toMajor > fromMajor) {
+    if (fromVersion && toMajor > getMajor(fromVersion)) {
       newValue = `~${toMajor}.0`;
     } else {
       newValue = `~${toMajor}.${toMinor}`;