PHP8.1 compatibility

.gitignore

@@ -2,4 +2,5 @@ coverage
 nbproject
 .idea
 vendor
-bin
+bin
+.phpunit.result.cache

.phpunit.result.cache

@@ -0,0 +1 @@
+{"version":1,"defects":{"Moserware\\Skills\\Tests\\Elo\\FideEloCalculatorTest::testFideProvisionalEloCalculator":3,"Moserware\\Skills\\Tests\\Elo\\FideEloCalculatorTest::testFideNonProvisionalEloCalculator":3,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testCumulativeTo":3,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testAt":3,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testMultiplication":3,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testDivision":3,"Moserware\\Skills\\Tests\\TrueSkill\\DrawMarginTest::testGetDrawMarginFromDrawProbability":3,"Moserware\\Skills\\Tests\\TrueSkill\\FactorGraphTrueSkillCalculatorTest::testFactorGraphTrueSkillCalculator":3,"Moserware\\Skills\\Tests\\TrueSkill\\TwoPlayerTrueSkillCalculatorTest::testTwoPlayerTrueSkillCalculator":3,"Moserware\\Skills\\Tests\\TrueSkill\\TwoTeamTrueSkillCalculatorTest::testTwoTeamTrueSkillCalculator":3},"times":{"Moserware\\Skills\\Tests\\Elo\\FideEloCalculatorTest::testFideProvisionalEloCalculator":0.001,"Moserware\\Skills\\Tests\\Elo\\FideEloCalculatorTest::testFideNonProvisionalEloCalculator":0,"Moserware\\Skills\\Tests\\Numerics\\BasicMathTest::testSquare":0,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testCumulativeTo":0,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testAt":0,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testMultiplication":0,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testDivision":0,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testLogProductNormalization":0,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testLogRatioNormalization":0,"Moserware\\Skills\\Tests\\Numerics\\GaussianDistributionTest::testAbsoluteDifference":0,"Moserware\\Skills\\Tests\\Numerics\\MatrixTest::testTwoByTwoDeterminant":0,"Moserware\\Skills\\Tests\\Numerics\\MatrixTest::testThreeByThreeDeterminant":0,"Moserware\\Skills\\Tests\\Numerics\\MatrixTest::testFourByFourDeterminant":0,"Moserware\\Skills\\Tests\\Numerics\\MatrixTest::testEightByEightDeterminant":0.035,"Moserware\\Skills\\Tests\\Numerics\\MatrixTest::testEquals":0,"Moserware\\Skills\\Tests\\Numerics\\MatrixTest::testAdjugate":0,"Moserware\\Skills\\Tests\\Numerics\\MatrixTest::testInverse":0,"Moserware\\Skills\\Tests\\RankSorterTest::testSort":0,"Moserware\\Skills\\Tests\\TrueSkill\\DrawMarginTest::testGetDrawMarginFromDrawProbability":0,"Moserware\\Skills\\Tests\\TrueSkill\\FactorGraphTrueSkillCalculatorTest::testFactorGraphTrueSkillCalculator":0.058,"Moserware\\Skills\\Tests\\TrueSkill\\TwoPlayerTrueSkillCalculatorTest::testTwoPlayerTrueSkillCalculator":0,"Moserware\\Skills\\Tests\\TrueSkill\\TwoTeamTrueSkillCalculatorTest::testTwoTeamTrueSkillCalculator":0.001}}

Dockerfile

@@ -0,0 +1,2 @@
+FROM php:8.1-alpine
+COPY --from=composer:2 /usr/bin/composer /usr/bin/composer

Makefile

@@ -0,0 +1,7 @@
+.PHONY: build
+build:
+	docker compose run --rm php composer install
+
+.PHONY: test
+test:
+	docker compose run --rm php vendor/bin/phpunit --testdox

composer.json

@@ -17,10 +17,10 @@
     }
   ],
   "require": {
-    "php": ">=5.3.0"
+    "php": ">=8.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "~4.0"
+    "phpunit/phpunit": "^9.5"
   },
   "autoload": {
     "psr-4": {
@@ -32,4 +32,4 @@
       "Moserware\\Skills\\Tests\\": "tests/"
     }
   }
-}
+}