fix: pin captcha package to compatible version

composer.json

@@ -29,7 +29,7 @@
     "league/oauth2-client": "^2.8",
     "league/period": "^4.9",
     "lochmueller/staticfilecache": "^12.5",
-    "sjbr/sr-freecap": "^2.6",
+    "sjbr/sr-freecap": "2.6.0",
     "ssch/typo3-encore": "^3.0",
     "symfony/http-client": "^4.3",
     "symfony/options-resolver": "^4.2",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "621e163177df6e19408e66534c7d924d",
+    "content-hash": "f0ff2587673ce0da1d0d53cc382a0922",
     "packages": [
         {
             "name": "b13/container",
@@ -2961,11 +2961,11 @@
         },
         {
             "name": "sjbr/sr-freecap",
-            "version": "v2.6.2",
+            "version": "v2.6.0",
             "source": {
                 "type": "git",
                 "url": "https://codeberg.org/sjbr/sr-freecap",
-                "reference": "cbdc34f79c9d18a5fb88080a07b4fc99589c490c"
+                "reference": "94e2849c0e384888ae1c28240eb7c7ba4e80d12e"
             },
             "require": {
                 "typo3/cms-core": "^10.4"
@@ -2999,7 +2999,7 @@
             "support": {
                 "issues": "https://forge.typo3.org/projects/extension-sr_freecap/issues"
             },
-            "time": "2020-12-26T16:51:50+00:00"
+            "time": "2020-06-16T02:30:11+00:00"
         },
         {
             "name": "ssch/typo3-encore",