docs: drop -D flag from install commands

Author: metonym

README.md

@@ -15,16 +15,16 @@ The Changelog is [available on GitHub](https://github.com/metonym/svelte-highlig
 
 ```bash
 # npm
-npm i -D svelte-highlight
+npm i svelte-highlight
 
 # pnpm
-pnpm i -D svelte-highlight highlight.js
+pnpm i svelte-highlight highlight.js
 
 # Bun
-bun i -D svelte-highlight
+bun i svelte-highlight
 
 # Yarn
-yarn add -D svelte-highlight
+yarn add svelte-highlight
 ```
 
 Note that [pnpm](https://github.com/pnpm/pnpm) users must also install `highlight.js`.

www/components/globals/Index.svelte

@@ -47,10 +47,10 @@
     <h4>Installation</h4>
   </Column>
   <Column xlg={6} lg={9}>
-    <CodeSnippet code="npm i -D {PKG_NAME}" /><br />
-    <CodeSnippet code="pnpm i -D {PKG_NAME} highlight.js" /><br />
-    <CodeSnippet code="bun add -D {PKG_NAME}" /><br />
-    <CodeSnippet code="yarn add -D {PKG_NAME}" />
+    <CodeSnippet code="npm i {PKG_NAME}" /><br />
+    <CodeSnippet code="pnpm i {PKG_NAME} highlight.js" /><br />
+    <CodeSnippet code="bun add {PKG_NAME}" /><br />
+    <CodeSnippet code="yarn add {PKG_NAME}" />
   </Column>
 </Row>