diff --git a/package-lock.json b/package-lock.json
index ce0c8e1..4d42d6c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "sdp.js",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "lockfileVersion": 1,
   "requires": true,
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+      "dev": true,
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         "through": ">=2.2.7 <3"
@@ -16,12 +17,14 @@
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+      "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
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     },
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       "resolved": "https://registry.npmjs.org/acorn-dynamic-import/-/acorn-dynamic-import-3.0.0.tgz",
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+      "dev": true,
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       }
@@ -30,36 +33,24 @@
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+      "dev": true,
       "requires": {
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         "acorn-dynamic-import": "^3.0.0",
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-      "integrity": "sha1-fajPLiZijtcygDWB/SH2fKzS7uw="
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-      "integrity": "sha1-iKK6tz0c97zVwbEYoAP2b2ZfpmI="
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-      "resolved": "https://registry.npmjs.org/array-reduce/-/array-reduce-0.0.0.tgz",
-      "integrity": "sha1-FziZ0//Rx9k4PkR5Ul2+J4yrXys="
+      "integrity": "sha1-z+nYwmYoudxa7MYqn12PHzUsEZU=",
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+      "dev": true,
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@@ -70,6 +61,7 @@
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       "integrity": "sha1-mZEtWRg2tab1s0XA8H7vwI/GXZE=",
+      "dev": true,
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@@ -77,12 +69,14 @@
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-          "integrity": "sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE="
+          "integrity": "sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE=",
+          "dev": true
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         "util": {
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           "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
           "integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
+          "dev": true,
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@@ -92,12 +86,14 @@
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       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
     },
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+      "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==",
+      "dev": true
     },
     "bit-buffer": {
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@@ -107,12 +103,14 @@
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-      "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA=="
+      "integrity": "sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==",
+      "dev": true
     },
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+      "dev": true,
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@@ -122,6 +120,7 @@
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+      "dev": true,
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@@ -132,12 +131,14 @@
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       "resolved": "https://registry.npmjs.org/brorand/-/brorand-1.1.0.tgz",
-      "integrity": "sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8="
+      "integrity": "sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=",
+      "dev": true
     },
     "browser-pack": {
       "version": "6.1.0",
       "resolved": "https://registry.npmjs.org/browser-pack/-/browser-pack-6.1.0.tgz",
       "integrity": "sha512-erYug8XoqzU3IfcU8fUgyHqyOXqIE4tUTTQ+7mqUjQlvnXkOO6OlT9c/ZoJVHYoAaqGxr09CN53G7XIsO4KtWA==",
+      "dev": true,
       "requires": {
         "JSONStream": "^1.0.3",
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@@ -151,6 +152,7 @@
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+      "dev": true,
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@@ -158,19 +160,22 @@
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           "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
-          "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs="
+          "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
+          "dev": true
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     "browser-stdout": {
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       "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
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+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
+      "dev": true
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     "browserify": {
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       "resolved": "https://registry.npmjs.org/browserify/-/browserify-16.2.2.tgz",
       "integrity": "sha512-fMES05wq1Oukts6ksGUU2TMVHHp06LyQt0SIwbXIHm7waSrQmNBZePsU0iM/4f94zbvb/wHma+D1YrdzWYnF/A==",
+      "dev": true,
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@@ -226,6 +231,7 @@
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+      "dev": true,
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         "cipher-base": "^1.0.0",
@@ -239,6 +245,7 @@
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+      "dev": true,
       "requires": {
         "browserify-aes": "^1.0.4",
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@@ -249,6 +256,7 @@
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+      "dev": true,
       "requires": {
         "cipher-base": "^1.0.1",
         "des.js": "^1.0.0",
@@ -260,6 +268,7 @@
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       "integrity": "sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=",
+      "dev": true,
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@@ -269,6 +278,7 @@
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       "integrity": "sha1-qk62jl17ZYuqa/alfmMMvXqT0pg=",
+      "dev": true,
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@@ -283,6 +293,7 @@
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+      "dev": true,
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@@ -291,6 +302,7 @@
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@@ -299,32 +311,38 @@
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-      "integrity": "sha1-kbx0sR6kBbyRa8aqkI+q+ltKrEs="
+      "integrity": "sha1-kbx0sR6kBbyRa8aqkI+q+ltKrEs=",
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+      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
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       "resolved": "https://registry.npmjs.org/buffer-xor/-/buffer-xor-1.0.3.tgz",
-      "integrity": "sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk="
+      "integrity": "sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk=",
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-      "integrity": "sha1-hZgoeOIbmOHGZCXgPQF0eI9Wnug="
+      "integrity": "sha1-hZgoeOIbmOHGZCXgPQF0eI9Wnug=",
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+      "integrity": "sha512-5r2GqsoEb4qMTTN9J+WzXfjov+hjxT+j3u5K+kIVNIwAd99DLCJE9pBIMP1qVeybV6JiijL385Oz0DcYxfbOIg==",
+      "dev": true
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     "cipher-base": {
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       "integrity": "sha512-Kkht5ye6ZGmwv40uUDZztayT2ThLQGfnj/T71N/XzeZeo3nf8foyW7zGTsPYkEya3m5f3cAypH+qe7YOrM1U2Q==",
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@@ -334,6 +352,7 @@
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       "integrity": "sha1-pY0N8ELBhvz4IqjoAV9UUNLXmos=",
+      "dev": true,
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@@ -344,17 +363,20 @@
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+      "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
+      "dev": true
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       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
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@@ -366,6 +388,7 @@
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+      "dev": true,
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@@ -373,22 +396,26 @@
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-      "integrity": "sha1-wguW2MYXdIqvHBYCF2DNJ/y4y3U="
+      "integrity": "sha1-wguW2MYXdIqvHBYCF2DNJ/y4y3U=",
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-      "integrity": "sha1-SCnId+n+SbMWHzvzZziI4gRpmGA="
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.1.3.tgz",
+      "integrity": "sha1-SCnId+n+SbMWHzvzZziI4gRpmGA=",
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+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
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+      "dev": true,
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@@ -398,6 +425,7 @@
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+      "dev": true,
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@@ -410,6 +438,7 @@
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+      "dev": true,
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@@ -423,6 +452,7 @@
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+      "dev": true,
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@@ -441,6 +471,7 @@
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