Merge pull request #1 from markmetcalfe/totara-4.1.5

TL-32522 Make jwt library compatible with PHP 7.3

### Release Notes for [4.1.5](https://github.com/lcobucci/jwt/milesto…

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This patch ships a minor security fix to prevent misuse of the `LocalFileReference` key.

### 4.1.5

- Total issues resolved: **0**
- Total pull requests resolved: **1**
- Total contributors: **1**

#### Security

 - [788: Merge release 4.0.4 into 4.1.x](lcobucci#788) thanks to @github-actions[bot]

### Release Notes for [4.0.4](https://github.com/lcobucci/jwt/milesto…

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This patch ships a minor security fix to prevent misuse of the `LocalFileReference` key.

### 4.0.4

- Total issues resolved: **0**
- Total pull requests resolved: **0**
- Total contributors: **0**

### Release Notes for [3.4.6](https://github.com/lcobucci/jwt/milesto…

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3.4.x bugfix release (patch)

### 3.4.6

- Total issues resolved: **0**
- Total pull requests resolved: **0**
- Total contributors: **0**

### Release Notes for [4.1.4](https://github.com/lcobucci/jwt/milesto…

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This release removes the possibility of having parsing issues when dealing with time-fractions with more than 6 decimal places.

### 4.1.4

- Total issues resolved: **0**
- Total pull requests resolved: **1**
- Total contributors: **1**

#### Bug

 - [711: Merge release 4.0.3 into 4.1.x](lcobucci#711) thanks to @github-actions[bot]

### Release Notes for [4.0.3](https://github.com/lcobucci/jwt/milesto…

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This release removes the possibility of having parsing issues when dealing with time-fractions with more than 6 decimal places.

### 4.0.3

- Total issues resolved: **1**
- Total pull requests resolved: **1**
- Total contributors: **2**

#### Bug

 - [710: Prevent type conversions issues when parsing time-fractions](lcobucci#710) thanks to @lcobucci
 - [709: Usage of `json&lcobucci#95;encode()` to convert time fractions to microseconds cause precision issues ](lcobucci#709) thanks to @sachchida1993

### Release Notes for [4.1.3](https://github.com/lcobucci/jwt/milesto…

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This release fixes a specification compatibility issue by making sure we use floats to represent time fractions.

### 4.1.3

- Total issues resolved: **0**
- Total pull requests resolved: **1**
- Total contributors: **1**

#### Bug

 - [707: Merge release 4.0.2 into 4.1.x](lcobucci#707) thanks to @github-actions[bot]

### Release Notes for [4.0.2](https://github.com/lcobucci/jwt/milesto…

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This release fixes a specification compatibility issue by making sure we use floats to represent time fractions.

### 4.0.2

- Total issues resolved: **0**
- Total pull requests resolved: **1**
- Total contributors: **1**

#### Bug

 - [706: Fix usage of non JSON numeric values for time fractions (without having precision issues)](lcobucci#706) thanks to @yassinrais

### Release Notes for [4.1.2](https://github.com/lcobucci/jwt/milesto…

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This release fixes the polyfill for sodium base64 encoding.

### 4.1.2

- Total issues resolved: **0**
- Total pull requests resolved: **1**
- Total contributors: **1**

#### Bug

 - [685: Fix SodiumBase64Polyfill fallback method reference](lcobucci#685) thanks to @Slamdunk

### Release Notes for [4.1.1](https://github.com/lcobucci/jwt/milesto…

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This release makes it possible to use the library when libsodium < 1.0.14 is installed.

### 4.1.1

- Total issues resolved: **0**
- Total pull requests resolved: **1**
- Total contributors: **1**

#### Bug

 - [670: Fix compatibility issues with older libsodium version (&lt; 1.0.14)](lcobucci#670) thanks to @Slamdunk