docs: fixed typos in pip install "web3[test]" (#3480)

* fix(setup.py): added the "tester" optional dependency back

* Add newsfragment for #3480

---------

Co-authored-by: kclowes <[email protected]>

Author: LuizDMM

newsfragments/3480.bugfix.rst

@@ -0,0 +1 @@
+Add back dependency extra for 'tester'.

setup.py

@@ -5,6 +5,10 @@
 )
 
 extras_require = {
+    "tester": [
+        "eth-tester[py-evm]>=0.11.0b1,<0.13.0b1",
+        "py-geth>=5.0.0",
+    ],
     "dev": [
         "build>=0.9.0",
         "bumpversion>=0.5.3",
@@ -30,8 +34,6 @@
     "test": [
         # Note: ethereum-maintained libraries in this list should be added to the
         # `install_pre_releases.py` script.
-        "eth-tester[py-evm]>=0.11.0b1,<0.13.0b1",
-        "py-geth>=5.0.0",
         "pytest-asyncio>=0.18.1,<0.23",
         "pytest-mock>=1.10",
         "pytest-xdist>=2.4.0",
@@ -40,7 +42,10 @@
 }
 
 extras_require["dev"] = (
-    extras_require["dev"] + extras_require["docs"] + extras_require["test"]
+    extras_require["dev"]
+    + extras_require["docs"]
+    + extras_require["test"]
+    + extras_require["tester"]
 )