Upgrade to Tika 1.20

   * Upgrade to POI 4.0.1 (TIKA-2751).

   * Integrate/parameterize new angles handling in
     PDFBox (TIKA-2779).

   * Upgrade to PDFBox 2.0.13 (TIKA-2788).

   * Prevent content within <style/> and <script/> elements
     to be written in the ToTextContentHandler (TIKA-2550).

   * Switch child to parent communication to a shared memory-mapped
     file in tika-server's -spawnChild mode.

   * Fix bug in tika-server when run in legacy mode (not -spawnChild)
     that caused it to return 503 on documents submitted after
     it hit an OutOfMemoryError (TIKA-2776).

   * Upgrade jaxb-runtime and javax.activation (TIKA-2778).

   * tika-app in batch mode now requires an interrupt or
     kill signal to the parent process to stop the parent
     and the child processes (TIKA-2780).

   * Bulk upgrade of dependencies (TIKA-2775).

   * Improve language id efficiency in tika-eval (TIKA-2777).

   * Upgrade sqlite "provided" dependency to 3.25.2 (TIKA-2773).

   * Remove duplication of notes in PPT slides (TIKA-2735)

   * Use -javaHome or $JAVA_HOME (if they exist) when
     spawning child in tika-server's -spawnChild mode.

   * Fixed closing of styles around Hyperlinks in Word Parser
     Contributed by Ronan O'Sullivan (TIKA-2599).