Implement String.toBoolean() for JS.

#KT-16348

js/js.libraries/src/core/numberConversions.kt

@@ -18,6 +18,11 @@ package kotlin.text
 
 
 
+/**
+ * Returns `true` if the contents of this string is equal to the word "true", ignoring case, and `false` otherwise.
+ */
+public fun String.toBoolean(): Boolean = toLowerCase() == "true"
+
 /**
  * Parses the string as a signed [Byte] number and returns the result.
  * @throws NumberFormatException if the string is not a valid representation of a number.

libraries/stdlib/common/src/kotlin/TextH.kt

@@ -126,6 +126,11 @@ expect fun CharSequence.regionMatches(thisOffset: Int, other: CharSequence, othe
 
 
 
+/**
+ * Returns `true` if the contents of this string is equal to the word "true", ignoring case, and `false` otherwise.
+ */
+expect fun String.toBoolean(): Boolean
+
 /**
  * Parses the string as a signed [Byte] number and returns the result.
  * @throws NumberFormatException if the string is not a valid representation of a number.

libraries/stdlib/test/text/StringNumberConversionTest.kt

@@ -5,7 +5,6 @@ import kotlin.test.*
 
 class StringNumberConversionTest {
 
-    @kotlin.jvm.JvmVersion
     @Test fun toBoolean() {
         assertEquals(true, "true".toBoolean())
         assertEquals(true, "True".toBoolean())