deps: update LICENSE and tools/icu/current_ver.dep

Update the LICENSE file and tools/icu/current_ver.dep file in order to
finalize the upgrade to ICU 64.2

LICENSE

@@ -118,8 +118,8 @@ The externally maintained libraries used by Node.js are:
   """
     COPYRIGHT AND PERMISSION NOTICE (ICU 58 and later)
 
-    Copyright © 1991-2018 Unicode, Inc. All rights reserved.
-    Distributed under the Terms of Use in http://www.unicode.org/copyright.html.
+    Copyright © 1991-2019 Unicode, Inc. All rights reserved.
+    Distributed under the Terms of Use in https://www.unicode.org/copyright.html.
 
     Permission is hereby granted, free of charge, to any person obtaining
     a copy of the Unicode data files and any associated documentation
@@ -1103,7 +1103,7 @@ The externally maintained libraries used by Node.js are:
     // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   """
 
-- jinja2, located at tools/jinja2, is licensed as follows:
+- jinja2, located at tools/inspector_protocol/jinja2, is licensed as follows:
   """
     Copyright (c) 2009 by the Jinja Team, see AUTHORS for more details.
 
@@ -1138,7 +1138,7 @@ The externally maintained libraries used by Node.js are:
     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   """
 
-- markupsafe, located at tools/markupsafe, is licensed as follows:
+- markupsafe, located at tools/inspector_protocol/markupsafe, is licensed as follows:
   """
     Copyright (c) 2010 by Armin Ronacher and contributors.  See AUTHORS
     for more details.
@@ -1255,7 +1255,7 @@ The externally maintained libraries used by Node.js are:
     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   """
 
-- gtest, located at deps/gtest, is licensed as follows:
+- gtest, located at test/cctest/gtest, is licensed as follows:
   """
     Copyright 2008, Google Inc.
     All rights reserved.

tools/icu/current_ver.dep

@@ -1,14 +1,6 @@
 [
   {
-    "url": "https://github.com/unicode-org/icu/releases/download/release-63-1/icu4c-63_1-src.zip",
-    "md5": "d25bc38089db64668fd86f34b4aa9b93"
-  },
-  {
-    "url": "https://sourceforge.net/projects/icu/files/ICU4C/63.1/icu4c-63_1-src.zip",
-    "md5": "d25bc38089db64668fd86f34b4aa9b93"
-  },
-  {
-    "url": "https://download.icu-project.org/files/icu4c/63.1/icu4c-63_1-src.zip",
-    "md5": "d25bc38089db64668fd86f34b4aa9b93"
+    "url": "https://github.com/unicode-org/icu/releases/download/release-64-2/icu4c-64_2-src.tgz",
+    "md5": "a3d18213beec454e3cdec9a3116d6b05"
   }
 ]