Add jsonpath support for checkver and hash extraction

Unravel if-blocks in checkver

Use new jsonpath for openssl, nuget, dart and bfg

bfg.json

@@ -1,7 +1,7 @@
 {
     "homepage": "https://rtyley.github.io/bfg-repo-cleaner/",
     "license": "GPL",
-    "version": "1.12.15",
+    "version": "1.12.14",
     "url": "https://repo1.maven.org/maven2/com/madgag/bfg/1.12.15/bfg-1.12.15.jar",
     "hash": "330af214a0fed320c591afc1046b0f31e8a438f290da09672973aeaa6411b09d",
     "suggest": {
@@ -17,7 +17,7 @@
     ",
     "checkver": {
         "url": "https://search.maven.org/solrsearch/select/?q=g:com.madgag+AND+a:bfg",
-        "re": "\"latestVersion\":\"([\\d.]+)\""
+        "jp": "$.response.docs[0].latestVersion"
     },
     "autoupdate": {
         "url": "https://repo1.maven.org/maven2/com/madgag/bfg/$version/bfg-$version.jar"

dart.json

@@ -18,7 +18,7 @@
     },
     "checkver": {
         "url": "https://storage.googleapis.com/dart-archive/channels/stable/release/latest/VERSION",
-        "re": "\"version\":\\s*\"(.*)\","
+        "jp": "$.version"
     },
     "autoupdate": {
         "architecture": {

nuget.json

@@ -1,13 +1,13 @@
 {
     "homepage": "https://www.nuget.org/",
-    "version": "3.5.0",
+    "version": "3.4.1",
     "license": "Apache 2.0",
     "url": "https://dist.nuget.org/win-x86-commandline/v3.5.0/NuGet.exe",
     "hash": "399ec24c26ed54d6887cde61994bb3d1cada7956c1b19ff880f06f060c039918",
     "bin": "NuGet.exe",
     "checkver": {
         "url": "https://dist.nuget.org/index.json",
-        "re": "latest\", \"version\": \"([\\d.]+)\""
+        "jp": "$.artifacts[0].versions[0].version"
     },
     "autoupdate": {
         "url": "https://dist.nuget.org/win-x86-commandline/v$version/NuGet.exe"

openssl.json

@@ -29,8 +29,8 @@
             }
         },
         "hash": {
-            "mode": "extract",
-            "find": "$basename.*\\s.*\\s.*\\s.*\\s.*\"([\\da-f]{64})\"",
+            "mode": "json",
+            "jp": "$.files.$basename.sha256",
             "url": "https://slproweb.com/download/win32_openssl_hashes.json"
         }
     }