Update README.md

Author: njlr

README.md

@@ -1,3 +1,5 @@
+<a target='_blank' rel='nofollow' href='https://app.codesponsor.io/link/hq7GXSxnYW3qEM98fqMVob9v/LoopPerfect/neither'>  <img alt='Sponsor' width='888' height='68' src='https://app.codesponsor.io/embed/hq7GXSxnYW3qEM98fqMVob9v/LoopPerfect/neither.svg' /></a>
+
 # neither
 
 A functional implementation of Either in C++14.
@@ -148,3 +150,5 @@ Alternatively you can copy & paste the headers to your include path:
 ```
 cp neither/include/*.hpp $InstallPath/include/neither
 ```
+
+<a target='_blank' rel='nofollow' href='https://app.codesponsor.io/link/hq7GXSxnYW3qEM98fqMVob9v/LoopPerfect/neither'>  <img alt='Sponsor' width='888' height='68' src='https://app.codesponsor.io/embed/hq7GXSxnYW3qEM98fqMVob9v/LoopPerfect/neither.svg' /></a>