chore: bump Go version to 1.21 and drop support for older go versions (#5)

* chore: bump go version

* docs: update readme

Author: mojixcoder

.github/workflows/test.yaml

@@ -10,7 +10,7 @@ on:
 
 env:
   # Upload coverage only for this go version.
-  LATEST_GO_VERSION: "1.21"
+  LATEST_GO_VERSION: "1.23"
 
 jobs:
   test:
@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest"]
-        go: ["1.18", "1.19", "1.20", "1.21"]
+        go: ["1.21", "1.22", "1.23"]
 
     name: ${{ matrix.os }} & Go ${{ matrix.go }}
 

README.md

@@ -18,7 +18,7 @@ If you want to get the most out of this package I highly recommend to read OSRM
 
 #### Installation
 ---
-Requires Go >= 1.18: `go get github.com/mojixcoder/gosrm`
+Requires Go >= 1.21: `go get github.com/mojixcoder/gosrm`
 
 #### How To Use
 ---