Add SVG image suport (#2487)

* Add SVG blip extentions

* SVG Image feature now works

* Add and simplify tests

* Fix falsey issue with file

Write tests
100% Coverage

docs/usage/images.md

@@ -6,6 +6,7 @@ To create a `floating` image on top of text:
 
 ```ts
 const image = new ImageRun({
+    type: 'gif',
     data: fs.readFileSync("./demo/images/pizza.gif"),
     transformation: {
         width: 200,
@@ -26,6 +27,7 @@ By default with no arguments, its an `inline` image:
 
 ```ts
 const image = new ImageRun({
+    type: 'gif',
     data: fs.readFileSync("./demo/images/pizza.gif"),
     transformation: {
         width: 100,
@@ -59,6 +61,7 @@ const doc = new Document({
             new Paragraph({
                 children: [
                     new ImageRun({
+                        type: [IMAGE_TYPE],
                         data: [IMAGE_BUFFER],
                         transformation: {
                             width: [IMAGE_SIZE],
@@ -97,6 +100,7 @@ To change the position the image to be on top of the text, simply add the `float
 
 ```ts
 const image = new ImageRun({
+    type: 'png',
     data: buffer,
     transformation: {
         width: 903,
@@ -115,6 +119,7 @@ const image = new ImageRun({
 
 ```ts
 const image = new ImageRun({
+    type: 'png',
     data: buffer,
     transformation: {
         width: 903,
@@ -180,6 +185,7 @@ For example:
 
 ```ts
 const image = new ImageRun({
+    type: 'gif',
     data: fs.readFileSync("./demo/images/pizza.gif"),
     transformation: {
         width: 200,
@@ -228,6 +234,7 @@ For example:
 
 ```ts
 const image = new ImageRun({
+    type: 'gif',
     data: fs.readFileSync("./demo/images/pizza.gif"),
     transformation: {
         width: 200,
@@ -258,6 +265,7 @@ Specifies common non-visual DrawingML properties. A name, title and description
 
 ```ts
 const image = new ImageRun({
+    type: 'gif',
     data: fs.readFileSync("./demo/images/pizza.gif"),
     altText: {
         title: "This is an ultimate title",

docs/usage/patcher.md

@@ -76,7 +76,7 @@ patchDocument(fs.readFileSync("My Document.docx"), {
                             ],
                             link: "https://www.google.co.uk",
                         }),
-                        new ImageRun({ data: fs.readFileSync("./demo/images/dog.png"), transformation: { width: 100, height: 100 } }),
+                        new ImageRun({ type: 'png', data: fs.readFileSync("./demo/images/dog.png"), transformation: { width: 100, height: 100 } }),
                     ],
                 }),
             ],