[Gradle, JS] Min and max are not nullable

^KT-41054 fixed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/NpmRange.kt

@@ -31,9 +31,15 @@ val NONE_RANGE = NpmRange(
 infix fun NpmRange.union(other: NpmRange): List<NpmRange> {
     if (!isIntersect(other)) return listOf(this, other)
 
-    val startVersion = min(this.startVersion, other.startVersion)
+    val startVersion = when {
+        this.startVersion == null || other.startVersion == null -> null
+        else -> min(this.startVersion, other.startVersion)
+    }
 
-    val endVersion = max(this.endVersion, other.endVersion)
+    val endVersion = when {
+        this.endVersion == null || other.endVersion == null -> null
+        else -> max(this.endVersion, other.endVersion)
+    }
 
     return NpmRange(
         startVersion = startVersion,

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/npm/semver.kt

@@ -182,14 +182,8 @@ fun Version.toSemVer(): SemVer =
         build = buildIdentifiers.joinToString(".").let { if (it.isNotEmpty()) it else null }
     )
 
-fun min(a: SemVer?, b: SemVer?): SemVer? {
-    if (a == null || b == null) return null
+fun min(a: SemVer, b: SemVer): SemVer =
+    if (a < b) a else b
 
-    return if (a < b) a else b
-}
-
-fun max(a: SemVer?, b: SemVer?): SemVer? {
-    if (a == null || b == null) return null
-
-    return if (a > b) a else b
-}
+fun max(a: SemVer, b: SemVer): SemVer =
+    if (a > b) a else b