add support for Extensions Lib 1.4 (#496)

* Support extensions lib 1.4

* Fix build

* Support UpdateStrategy

* Update extension lib min/max to match Tachiyomi

* Use HttpSource.getMangaUrl and add Chapter.realUrl

server/src/main/kotlin/eu/kanade/tachiyomi/network/JavaScriptEngine.kt

@@ -0,0 +1,27 @@
+package eu.kanade.tachiyomi.network
+
+import android.content.Context
+import app.cash.quickjs.QuickJs
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+/**
+ * Util for evaluating JavaScript in sources.
+ */
+class JavaScriptEngine(context: Context) {
+
+    /**
+     * Evaluate arbitrary JavaScript code and get the result as a primitive type
+     * (e.g., String, Int).
+     *
+     * @since extensions-lib 1.4
+     * @param script JavaScript to execute.
+     * @return Result of JavaScript code as a primitive type.
+     */
+    @Suppress("UNUSED", "UNCHECKED_CAST")
+    suspend fun <T> evaluate(script: String): T = withContext(Dispatchers.IO) {
+        QuickJs.create().use {
+            it.evaluate(script) as T
+        }
+    }
+}

server/src/main/kotlin/eu/kanade/tachiyomi/network/Requests.kt

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.network
 import okhttp3.CacheControl
 import okhttp3.FormBody
 import okhttp3.Headers
+import okhttp3.HttpUrl
 import okhttp3.Request
 import okhttp3.RequestBody
 import java.util.concurrent.TimeUnit.MINUTES
@@ -23,6 +24,21 @@ fun GET(
         .build()
 }
 
+/**
+ * @since extensions-lib 1.4
+ */
+fun GET(
+    url: HttpUrl,
+    headers: Headers = DEFAULT_HEADERS,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL
+): Request {
+    return Request.Builder()
+        .url(url)
+        .headers(headers)
+        .cacheControl(cache)
+        .build()
+}
+
 fun POST(
     url: String,
     headers: Headers = DEFAULT_HEADERS,